Quarterly report pursuant to Section 13 or 15(d)

8. Stock-Based Compensation (Tables)

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8. Stock-Based Compensation (Tables)
 9 Months Ended
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Employee stock-based compensation expense
    Three Months     Nine Months  
    Ended     Ended  
    December 31,     December 31,  
    2017     2016     2017     2016  
Cost of service revenue   $ 43,000     $ 63,000     $ 136,000     $ 197,000  
Research and development     38,000       77,000       128,000       201,000  
Selling, general and administrative     584,000       774,000       1,266,000       1,334,000  
Total stock-based compensation   $ 665,000     $ 914,000     $ 1,530,000     $ 1,732,000  
Schedule of option activity
    Number of
Shares		     Weighted-
Average
Exercise Price		     Weighted-
Average
Contractual Term		     Aggregate
Intrinsic
Value		  
Outstanding at April 1, 2017     899,000     $ 17.87                  
Options granted     536,000       6.83                  
Options exercised     (1,000 )     5.27                  
Options forfeited     (42,000 )     6.77                  
Options expired     (7,000 )     228.22                  
Outstanding at December 31, 2017     1,385,000     $ 12.76       7.68     $ 128,000  
Exercisable at December 31, 2017     757,000     $ 17.92       6.50     $ 90,000  
Restricted Stock Award Activity
   

Number of

Shares

    

Weighted

Average Award

Date Fair Value

per Share

  
Unvested restricted stock awards outstanding at April 1, 2017     34,000     $ 7.27  
Restricted stock awards granted     98,000       5.49  
Restricted stock awards vested     (99,000 )     5.78  
Unvested restricted stock awards outstanding at December 31, 2017     33,000     $ 6.46