Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Product revenue	$ 15,352	$ 15,795
Service revenue	282	792
Total revenue	15,634	16,587
Cost of product revenue	11,419	12,113
Cost of service revenue	189	717
Total cost of revenue	11,608	12,830
Gross profit	4,026	3,757
Operating expenses:
General and administrative	3,901	3,872
Sales and marketing	2,895	3,068
Research and development	481	422
Total operating expenses	7,277	7,362
Loss from operations	(3,251)	(3,605)
Other income (expense):
Other income	100	0
Interest expense	(70)	(91)
Interest income	10	48
Total other income (expense)	40	(43)
Loss before income tax	(3,211)	(3,648)
Income tax (benefit) expense	(271)	4
Net loss and comprehensive loss	$ (2,940)	$ (3,652)
Basic net loss per share attributable to common shareholders (in dollars per share)	$ (0.11)	$ (0.13)
Weighted-average common shares outstanding (in shares)	27,885,588	27,481,624
Diluted net loss per share (in dollars per share)	$ (0.11)	$ (0.13)
Weighted-average common shares and share equivalents outstanding (in shares)	27,885,588	27,481,624