Quarterly report pursuant to Section 13 or 15(d)

8. Stock-Based Compensation (Tables)

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8. Stock-Based Compensation (Tables)
 3 Months Ended
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Employee stock-based compensation expense
    Three Months Ended June 30,  
    2017     2016  
Cost of revenues   $ 44,000     $ 68,000  
Research and development     45,000       64,000  
Selling, general and administrative     349,000       279,000  
Total stock-based compensation   $ 438,000     $ 411,000  
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     483,000       6.93                  
Options forfeited     (22,000 )     6.68                  
Options expired     (7,000 )     234.45                  
Outstanding at June 30, 2017     1,353,000     $ 12.99       8.12     $ 525,000  
Exercisable at June 30, 2017     723,000     $ 18.57       6.91     $ 336,000  
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     20,000       6.89  
Restricted stock awards vested     (9,000 )     6.83  
Unvested restricted stock awards outstanding at June 30, 2017     45,000     $ 7.19