Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Stock-Based Compensation - RSU's and PRSU's (Details) - USD ($)
1 Months Ended 3 Months Ended
Aug. 31, 2017
Jun. 30, 2019
Jun. 30, 2018
Additional disclosure      
Stock-based compensation expense   $ 262,000 $ 227,000
Employee Stock Purchase Plan      
Weighted Average Grant-Date Fair Value      
Number of shares of common stock reserved for issuance 70,000 570,000  
Increase in common stock available under the plan 500,000    
Number of shares available for future grant   497,909  
Number of shares issued     1,012
Maximum amount that can be contributed by the employee   $ 25,000  
Maximum percentage of regular compensation that can be contributed by the employee   15.00%  
Percentage of the fair market value of common stock on the last day of the purchase right period   95.00%  
Restricted stock units and performance restricted stock units      
Shares      
Nonvested, balance at the beginning of the period (in shares)   2,217,433  
Granted (in shares)   905,848  
Vested and issued (in shares)   (2,278)  
Forfeited (in shares)   (36,329)  
Nonvested, balance at the end of the period (in shares)   3,084,674  
Awards expected to vest (in shares)   3,084,651  
Weighted Average Grant-Date Fair Value      
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share)   $ 1.02  
Granted (in dollars per share)   0.59  
Vested and issued (in dollars per share)   12.80  
Forfeited (in dollars per share)   0.85  
Nonvested restricted stock units outstanding at the end of the period (in dollars per share)   0.89  
Awards expected to vest (in dollars per share)   $ 0.89  
Restricted stock units      
Additional disclosure      
Stock-based compensation expense   $ 262,000 $ 227,000
Aggregate fair value of restricted stock units vested and issued   2,000 $ 7,000
Unrecognized compensation cost   $ 1,500,000  
Weighted average period for recognizing compensation cost   1 year 9 months 18 days  
Weighted Average Grant-Date Fair Value      
Granted (in dollars per share)   $ 0.59 $ 1.59
Restricted stock units | Awards vesting on the second year anniversary      
Additional disclosure      
Vesting period   2 years  
Awards vesting percentage   100.00%  
Vesting period of awards after issuance date   2 years  
Restricted stock units | Awards vesting one-third annually      
Additional disclosure      
Vesting period   3 years  
Awards vesting percentage   33.33%  
Vesting period of awards after issuance date   1 year  
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  
Performance Restricted Stock Units      
Additional disclosure      
Stock-based compensation expense   $ 0  
Aggregate fair value of restricted stock units vested and issued   $ 0  
Performance goal payment as a percentage of target   50.00%  
Weighted Average Grant-Date Fair Value      
Granted (in dollars per share)   $ 0.89  
Performance Restricted Stock Units | Maximum      
Additional disclosure      
Performance goal payment as a percentage of target   150.00%  
Performance Restricted Stock Units | Three-year performance measurement period      
Additional disclosure      
Performance measurement period   3 years  
Shares      
Granted (in shares)   301,356  
PRSU Program | Two-year performance measurement period      
Additional disclosure      
Performance measurement period   2 years  
PRSU Program | Three-year performance measurement period      
Additional disclosure      
Performance measurement period   3 years  
Restricted Stock Awards      
Additional disclosure      
Stock-based compensation expense   $ 0 $ 0
Shares      
Granted (in shares)   0 0
Non-employee director | Restricted stock units      
Additional disclosure      
Vesting period   1 year