Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating activities
Net loss	$ (9,256)	$ (27,368)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	2,320	2,154
Amortization of long-term assets	1,055	1,106
Stock-based compensation expense	1,166	1,250
Impairment on assets	0	12,130
(Gain) loss on sale of property and equipment	18	(4)
Provision for inventory reserves	41	224
Provision for bad debts	245	236
Other	56	108
Changes in operating assets and liabilities, net of effects of acquisition:
Accounts receivable, current and long-term	3,660	(1,856)
Inventories	(4,192)	(2,975)
Deferred contract costs	44	(80)
Prepaid expenses and other assets	1,951	(3,645)
Accounts payable	1,017	8,090
Accrued expenses and other	(1,333)	721
Deferred revenue	(117)	(308)
Net cash used in operating activities	(3,325)	(10,217)
Investing activities
Purchase of property and equipment	(302)	(1,647)
Purchase of short-term investments	0	(2)
Additions to patents and licenses	(6)	(61)
Proceeds from sales of property, plant and equipment	0	1,040
Net cash used in investing activities	(308)	(670)
Financing activities
Payment of long-term debt and capital leases	(1,450)	(2,692)
Proceeds from long-term debt	0	446
Proceeds from revolving credit facility	47,996	0
Payment of revolving credit facility	(45,523)	0
Proceeds from issuance of common stock, net of offering costs	(1)	0
Proceeds from repayment of shareholder notes	0	11
Repurchase of common stock into treasury	(20)	0
Deferred financing costs	0	(75)
Net proceeds from the exercise of warrants and employee stock options	87	384
Net cash (used in) provided by financing activities	1,089	(1,926)
Net decrease in cash and cash equivalents	(2,544)	(12,813)
Cash and cash equivalents at beginning of period	20,002	17,568
Cash and cash equivalents at end of period	17,458	4,755
Supplemental cash flow information:
Cash paid for interest	128	147
Cash paid for income taxes	20	35
Supplemental disclosure of non-cash investing and financing activities:
Vendor financed capital lease addition	$ 377	$ 0