Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 2,930	$ 3,564
Marketable securities		2,639
Accounts receivable, net of allowance for doubtful accounts of $861 and $1,173,	4,285	5,252
Inventories	3,371	3,589
Prepaid expenses and other current assets	1,155	1,414
Total current assets	11,741	16,458
Property and equipment:
Furniture and fixtures	616	620
Leasehold improvements	519	511
Equipment	3,962	3,988
Property and equipment, gross	5,097	5,119
Accumulated depreciation	4,166	4,094
Property and equipment, net	931	1,025
Deferred income taxes	137	139
Intangible assets, net	6,085	6,463
Other assets	300	300
TOTAL ASSETS	19,194	24,385
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	1,726	2,409
Accrued compensation	296	1,202
Warranty and other current liabilities	2,002	1,959
Total current liabilities	4,024	5,570
Deferred income taxes	176	175
Other long-term liabilities	120	126
Shareholders' equity:
Preferred stock, $.01 par value; 5,000,000 shares authorized, none issued or outstanding
Common stock, $.01 par value; 20,000,000 shares authorized, 4,978,558 and 4,974,847 outstanding, respectively	49	49
Additional paid-in capital	23,363	23,276
Accumulated other comprehensive income	634	604
Retained earnings	(9,172)	(5,415)
Total shareholders' equity	14,874	18,514
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 19,194	$ 24,385