Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Total
Balance at Mar. 31, 2018	$ 57	$ 889,585	$ (862,224)	$ (1,658)	$ 25,760
Balance (in shares) at Mar. 31, 2018	5,706,260			14,596
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock				$ (3)	(3)
Purchase of treasury stock (in shares)				168
Vested restricted stock awards		3			3
Vested restricted stock awards (in shares)	469
Stock-based compensation		227			227
Warrants exercised	$ 3	4,967			4,970
Warrants exercised (in shares)	346,691
Issuance of common stock, net of issuance costs	$ 4	(4)
Issuance of common stock, net of issuance costs (in shares)	380,621
Net loss			(4,898)		(4,898)
Balance at Jun. 30, 2018	$ 64	894,778	(867,122)	$ (1,661)	26,059
Balance (in shares) at Jun. 30, 2018	6,434,041			14,764
Balance at Mar. 31, 2018	$ 57	889,585	(862,224)	$ (1,658)	25,760
Balance (in shares) at Mar. 31, 2018	5,706,260			14,596
Increase (Decrease) in Stockholders' Equity
Net loss					(12,704)
Balance at Dec. 31, 2018	$ 72	901,262	(874,929)	$ (1,731)	24,674
Balance (in shares) at Dec. 31, 2018	7,180,348			21,021
Balance at Jun. 30, 2018	$ 64	894,778	(867,122)	$ (1,661)	26,059
Balance (in shares) at Jun. 30, 2018	6,434,041			14,764
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock				$ (70)	(70)
Purchase of treasury stock (in shares)				6,254
Vested restricted stock awards		70			70
Vested restricted stock awards (in shares)	330
Stock-based compensation		224			224
Exercise of stock options and employee stock purchases		1			1
Exercise of stock options and employee stock purchases (in shares)	102
Stock awards to Board of Directors		(70)			(70)
Stock awards to Board of Directors (in shares)	45,719
Issuance of common stock, net of issuance costs	$ 4	3,105			3,109
Issuance of common stock, net of issuance costs (in shares)	301,608
Net loss			(4,357)		(4,357)
Balance at Sep. 30, 2018	$ 68	898,108	(871,479)	$ (1,731)	24,966
Balance (in shares) at Sep. 30, 2018	6,781,800			21,018
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock (in shares)				3
Vested restricted stock awards (in shares)	12,090
Stock-based compensation		292			292
Issuance of common stock, net of issuance costs	$ 4	2,862			2,866
Issuance of common stock, net of issuance costs (in shares)	386,458
Net loss			(3,450)		(3,450)
Balance at Dec. 31, 2018	$ 72	901,262	(874,929)	$ (1,731)	24,674
Balance (in shares) at Dec. 31, 2018	7,180,348			21,021
Balance at Mar. 31, 2019	$ 7	903,803	(878,884)	$ (1,772)	23,154
Balance (in shares) at Mar. 31, 2019	7,216,910			26,239
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock (in shares)				78
Vested restricted stock awards (in shares)	229
Stock-based compensation		262			262
Issuance of common stock, net of issuance costs	$ 1	1,221			1,222
Issuance of common stock, net of issuance costs (in shares)	143,387
Net loss			(5,593)		(5,593)
Balance at Jun. 30, 2019	$ 8	905,286	(884,477)	$ (1,772)	19,045
Balance (in shares) at Jun. 30, 2019	7,360,526			26,317
Balance at Mar. 31, 2019	$ 7	903,803	(878,884)	$ (1,772)	23,154
Balance (in shares) at Mar. 31, 2019	7,216,910			26,239
Increase (Decrease) in Stockholders' Equity
Deemed dividend on purchase warrant for common shares					75
Net loss					(14,948)
Balance at Dec. 31, 2019	$ 9	912,097	(893,907)	$ (1,816)	16,383
Balance (in shares) at Dec. 31, 2019	8,841,634			36,724
Balance at Jun. 30, 2019	$ 8	905,286	(884,477)	$ (1,772)	19,045
Balance (in shares) at Jun. 30, 2019	7,360,526			26,317
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock				$ (26)	(26)
Purchase of treasury stock (in shares)				3,987
Vested restricted stock awards		26			26
Vested restricted stock awards (in shares)	1,250
Stock-based compensation		104			104
Exercise of stock options and employee stock purchases		3			3
Exercise of stock options and employee stock purchases (in shares)	522
Stock awards to Board of Directors		(24)			(24)
Stock awards to Board of Directors (in shares)	26,315
Issuance of common stock, net of issuance costs		4,815			4,815
Issuance of common stock, net of issuance costs (in shares)	616,443
Deemed dividend on purchase warrant for common shares		75	(75)
Net loss			(4,448)		(4,448)
Balance at Sep. 30, 2019	$ 8	910,285	(889,000)	$ (1,798)	19,495
Balance (in shares) at Sep. 30, 2019	8,005,056			30,304
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock				$ (18)	(18)
Purchase of treasury stock (in shares)				6,420
Vested restricted stock awards		17			17
Vested restricted stock awards (in shares)	19,961
Stock-based compensation		303			303
Warrants exercised	$ 1				1
Warrants exercised (in shares)	440,000
Issuance of common stock, net of issuance costs		1,201			1,201
Issuance of common stock, net of issuance costs (in shares)	376,617
Change in warrants valuation		291			291
Net loss			(4,907)		(4,907)
Balance at Dec. 31, 2019	$ 9	$ 912,097	$ (893,907)	$ (1,816)	$ 16,383
Balance (in shares) at Dec. 31, 2019	8,841,634			36,724