Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Operations
Product revenues	$ 11,702	$ 11,086	$ 23,625	$ 22,093
Service revenues	13,546	12,974	28,806	25,893
Total revenues	25,248	24,060	52,431	47,986
Cost of product revenues	6,278	6,196	13,141	12,150
Cost of service revenues	9,002	8,409	19,417	16,972
Total cost of revenues	15,280	14,605	32,558	29,122
Gross profit	9,968	9,455	19,873	18,864
Operating expenses:
Selling, general and administrative	9,153	7,858	17,850	15,663
Research and development	1,881	1,698	3,608	3,308
Amortization of intangible assets	33	84	66	169
Total operating expenses	11,067	9,640	21,524	19,140
Operating loss	(1,099)	(185)	(1,651)	(276)
Non-operating income (expense):
Other income (expense), net	2	(2)	(5)	(6)
Interest income, net	3	4	5	5
Loss from continuing operations before income taxes	(1,094)	(183)	(1,651)	(277)
Benefit for income taxes	33	8	34	7
Loss from continuing operations	(1,061)	(175)	(1,617)	(270)
Gain on sale of discontinued operation, net of tax	77	135	163	191
Net loss	$ (984)	$ (40)	$ (1,454)	$ (79)
Loss per share from continuing operations - basic and diluted (in dollars per share)	$ (0.03)	$ (0.01)	$ (0.05)	$ (0.01)
Gain per share from sale of discontinued operation - basic and diluted (in dollars per share)	0.00	0.01	0.01	0.01
Net loss per share - basic and diluted (in dollars per share)	$ (0.03)	$ 0.00	$ (0.04)	$ 0.00
Shares used in basic and diluted per share calculations (in shares)	32,628	32,117	32,567	32,085