Quarterly report pursuant to Section 13 or 15(d)

8. Stock-Based Compensation (Tables)

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8. Stock-Based Compensation (Tables)
 6 Months Ended
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Employee stock-based compensation expense
    Three Months     Six Months  
    Ended     Ended  
    September 30,     September 30,  
    2017     2016     2017     2016  
Cost of service revenue   $ 49,000     $ 66,000     $ 93,000     $ 134,000  
Research and development     45,000       60,000       90,000       124,000  
Selling, general and administrative     333,000       280,000       682,000       559,000  
Total stock-based compensation   $ 427,000     $ 406,000     $ 865,000     $ 817,000  
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     (33,000 )     6.76                  
Options expired     (8,000 )     229.31                  
Outstanding at September 30, 2017     1,393,000     $ 12.75       7.94     $ 75,000  
Exercisable at September 30, 2017     739,000     $ 18.27       6.71     $ 59,000  
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     42,000       6.12  
Restricted stock awards vested     (19,000 )     6.12  
Unvested restricted stock awards outstanding at September 30, 2017     57,000     $ 6.80