Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details Textual)

v3.19.1
Commitments and Contingencies (Details Textual) - USD ($)
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Loss Contingencies [Line Items]    
Operating Leases, Rent Expense, Net $ 900,000 $ 900,000
Operating Leases, Income Statement, Sublease Revenue 0 100,000
PaymentsForRentReducedRestructuringAccrual   100,000
Reserve on Firm Purchase Commitments 167,000 130,000
Loss Contingency Accrual $ 300,000  
New Hampshire office lease [Member]    
Loss Contingencies [Line Items]    
Lease Expiration Date Aug. 31, 2020  
Ohio design lease [Member]    
Loss Contingencies [Line Items]    
Lease Expiration Date Oct. 31, 2019  
Aurora lease [Member]    
Loss Contingencies [Line Items]    
Contractual Obligation $ 59,000 $ 59,000