Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - RSU's and PRSU's (Details)

Stock-Based Compensation - RSU's and PRSU's (Details) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Additional disclosure
Share based compensation expenses	$ 174,000		$ 656,000		$ 653,000	$ 1,504,000
Restricted stock units
Shares
Granted (in shares)		14,820
Nonvested, balance at the end of the period (in shares)	14,820				14,820
Weighted Average Grant-Date Fair Value
Granted (in dollars per share)	$ 0.91		$ 1.19		$ 1.64	$ 3.34
Additional disclosure
Share based compensation expenses	$ 165,000		$ 204,000		$ 540,000	$ 715,000
Aggregate fair value of restricted stock units vested and issued	25,000		$ 4,000		132,000	$ 344,000
Unrecognized compensation cost	$ 600,000				$ 600,000
Restricted stock units \| Awards vesting over four years with one-fourth units vesting one year after the issuance date
Additional disclosure
Vesting period					4 years
Awards vesting percentage					25.00%
Vesting period of awards after issuance date					1 year
PRSU Program
Shares
Nonvested, balance at the beginning of the period (in shares)					256,787
Granted (in shares)					230,439
Vested and issued (in shares)					(95,383)
Forfeited (in shares)					(44,582)
Nonvested, balance at the end of the period (in shares)	347,261				347,261		256,787
Awards expected to vest (in shares)	322,475				322,475
Weighted Average Grant-Date Fair Value
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share)					$ 6.53
Granted (in dollars per share)				$ 15.50	1.64
Vested and issued (in dollars per share)					8.28
Forfeited (in dollars per share)					6.54
Nonvested restricted stock units outstanding at the end of the period (in dollars per share)	$ 2.80				2.80		$ 6.53
Awards expected to vest (in dollars per share)	$ 2.83				$ 2.83
Additional disclosure
Share based compensation expenses							$ 0
Performance measurement period					3 years
Vesting right percentage of awards that will vest after end of applicable performance measurement period					50.00%
Vesting right percentage of awards that will vest one year after end of performance measurement period					50.00%
Restricted Stock Awards
Shares
Granted (in shares)	1,389		255,912		63,500	263,594
Weighted Average Grant-Date Fair Value
Granted (in dollars per share)	$ 0.90		$ 1.24		$ 1.56	$ 1.44
Additional disclosure
Share based compensation expenses	$ 1,000		$ 317,000		$ 102,000	$ 380,000
Weighted average period for recognizing compensation cost					1 year 8 months 12 days
Chief Executive Officer \| PRSU Program
Shares
Granted (in shares)	0			10,000	0
Non-employee director \| Restricted stock units
Additional disclosure
Vesting period					1 year