Consolidated Balance Sheets - USD ($)	Mar. 31, 2016	Mar. 31, 2015
Assets [Abstract]
Cash and cash equivalents	$ 15,542,000	$ 20,002,000
Accounts receivable, net	10,889,000	18,263,000
Inventories, net	17,024,000	14,283,000
Deferred contract costs	36,691	90,258
Prepaid expenses and other current assets	5,038,000	2,407,000
Total current assets	48,530,000	55,045,000
Property and equipment, net	17,004,000	21,223,000
Goodwill	0	4,409,000
Other intangible assets, net	5,048,000	6,335,000
Long-term accounts receivable	108,000	426,000
Other long-term assets	185,000	367,000
Total assets	70,875,000	87,805,000
Liabilities and Equity [Abstract]
Accounts payable	11,716,000	11,003,000
Accrued expenses and other	6,586,000	5,197,000
Deferred revenue, current	243,000	287,000
Current maturities of long-term debt	746,000	1,832,000
Total current liabilities	19,291,000	18,319,000
Revolving credit facility	3,719,000	2,500,000
Long-term debt, less current maturities	302,000	722,000
Deferred revenue, long-term	1,022,000	1,231,000
Other long-term liabilities	558,000	522,000
Total liabilities	$ 24,892,000	$ 23,294,000
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 shares at March 31, 2016 and 2015; no shares issued and outstanding at March 31, 2016 and 2015	$ 0	$ 0
Common stock, no par value: Shares authorized: 200,000,000 at March 31, 2016 and 2015; shares issued: 37,192,559 and 36,837,864 at March 31, 2016 and 2015; shares outstanding: 27,767,138 and 27,421,533 at March 31, 2016 and 2015	0	0
Additional paid-in capital	152,140,000	150,516,000
Treasury stock: 9,425,421 and 9,416,331 common shares at March 31, 2016 and 2015	(36,075,000)	(36,049,000)
Shareholder notes receivable	(4,000)	(4,000)
Retained deficit	(70,078,000)	(49,952,000)
Total shareholders’ equity	45,983,000	64,511,000
Total liabilities and shareholders’ equity	$ 70,875,000	$ 87,805,000