Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 8,334	$ 5,224
Marketable securities	4,817	2,093
Accounts receivable, net of allowance for doubtful accounts of $796 and $677, respectively	6,722	10,148
Inventories	4,485	6,142
Prepaid expenses and other current assets	1,611	1,644
Deferred income taxes	186	429
Total current assets	26,155	25,680
Property and equipment:
Furniture and fixtures	461	444
Leasehold improvements	471	363
Equipment	4,427	3,364
Property and equipment, gross	5,359	4,171
Accumulated depreciation	3,484	2,736
Property and equipment, net	1,875	1,435
Deferred income taxes	4,017	3,131
Intangible assets, net	6,489	7,888
Goodwill		3,120
TOTAL ASSETS	38,536	41,254
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	2,112	1,998
Accrued compensation	949	1,013
Warranty and other current liabilities	1,086	1,601
Total current liabilities	4,147	4,612
Deferred income taxes	241
Other long-term liabilities	168	316
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, 4,966,619 and 4,910,619 issued and outstanding, respectively	49	49
Additional paid-in capital	23,055	22,619
Accumulated other comprehensive income (loss)	390	(180)
Retained earnings	10,486	13,838
Total shareholders' equity	33,980	36,326
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 38,536	$ 41,254