1. THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PP&E (Details)	12 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Property and equipment, net:
Impairment losses on long-lived equipment	$ 0	$ 0	$ 0
Inventories
Minimum months to determine excess inventory	12 months
Inventory Write-down	$ 1,561,000	588,000	1,172,000
Segments
Number of Reportable Segments | segment	1
Operating segments | segment	1
Accounting for stock-based compensation
Expected life	5 years
Dividend yield (as a percent)	0.00%
Comprehensive income (loss)	$ (4,595,000)	(204,000)	$ (2,169,000)
Income taxes
Valuation allowance	$ 5,913,000	$ 8,939,000
Minimum
Property and equipment, net:
Useful life, intangible assets	5 years
Maximum
Property and equipment, net:
Useful life, intangible assets	15 years
Software | Minimum
Property and equipment, net:
Useful life, property and equipment	3 years
Software | Maximum
Property and equipment, net:
Useful life, property and equipment	5 years
Computer and other equipment | Minimum
Property and equipment, net:
Useful life, property and equipment	5 years
Computer and other equipment | Maximum
Property and equipment, net:
Useful life, property and equipment	10 years
Building and building improvements | Minimum
Property and equipment, net:
Useful life, property and equipment	10 years
Building and building improvements | Maximum
Property and equipment, net:
Useful life, property and equipment	25 years
Furniture and fixtures
Property and equipment, net:
Useful life, property and equipment	7 years