Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 13,901	$ 16,762
Accounts receivable, net of allowances of $263 and $358 at December 31, 2015 and 2014, respectively	7,538	5,289
Inventories	3,623	3,201
Prepaid expenses and other current assets	1,674	1,134
Total current assets	26,736	26,386
Property and equipment, net	12,850	13,041
Intangible assets, net	1,598	2,182
Goodwill	10,010	10,503
Other assets	185	96
Total assets	51,379	52,208
Liabilities and Shareholders' Equity
Accounts payable	2,004	2,873
Accrued expenses	4,158	1,918
Deferred revenue	1,336	914
Notes payable	238	243
Total current liabilities	7,736	5,948
Deferred revenue, net of current portion	710	1,553
Notes payable, net of current portion	2,897	3,289
Deferred rent	69
Total liabilities	$ 11,412	$ 10,790
Commitments and contingencies (Note 8)
Contingently redeemable series C preferred stock, 0.55 shares issued and outstanding (liquidation preference of $550)	$ 550	$ 550
Shareholders' equity:
Preferred stock, $.01 par value; 1,000 shares authorized Series B convertible preferred stock, 0.13 shares issued and outstanding (liquidation preference of $13)
Common stock $.01 par value; 150,000 shares authorized; 12,215 issued and 10,802 outstanding at December 31, 2015 and 12,186 shares issued and 10,775 outstanding at December 31, 2014	$ 122	$ 122
Additional paid-in capital	289,464	287,660
Treasury stock (at cost), 1,413 and 1,411 shares at December 31, 2015 and 2014, respectively	(8,601)	(8,579)
Accumulated deficit	(240,406)	(238,272)
Accumulated other comprehensive income	(1,162)	(63)
Total shareholders' equity	39,417	40,868
Total liabilities and shareholders' equity	$ 51,379	$ 52,208