10. COMMITMENTS AND CONTINGENT LIABILITIES (Details)	3 Months Ended
	Jun. 30, 2016 USD ($) ft²	Jun. 30, 2015 USD ($)
10. COMMITMENTS AND CONTINGENT LIABILITIES (Details) [Line Items]
Operating Leases, Rent Expense	$ 182,000	$ 206,000
Purchase Obligation	$ 13,841,000
Leased Facility for Corporate Functions, Sales Support, Marketing and Finance [Member] | Building [Member]
10. COMMITMENTS AND CONTINGENT LIABILITIES (Details) [Line Items]
Area of Real Estate Property (in Square Feet) | ft²	16,228
Operating Leases, Rent Expense, Minimum Rentals	$ 235,000
Leased Facility for Engineering and Operating Groups [Member] | Building [Member]
10. COMMITMENTS AND CONTINGENT LIABILITIES (Details) [Line Items]
Area of Real Estate Property (in Square Feet) | ft²	21,700
Operating Leases, Rent Expense, Minimum Rentals	$ 228,000