Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 3,691	$ 8,334
Marketable securities	3,883	4,817
Accounts receivable, net of allowance for doubtful accounts of $1,025 and $796,	5,997	6,722
Inventories	4,495	4,485
Prepaid expenses and other current assets	3,973	1,797
Total current assets	22,039	26,155
Property and equipment:
Furniture and fixtures	502	461
Leasehold improvements	497	471
Equipment	4,637	4,427
Property and equipment, gross	5,636	5,359
Accumulated depreciation	4,088	3,484
Property and equipment, net	1,548	1,875
Deferred income taxes	4,017	4,017
Intangible assets, net	6,187	6,489
Other assets	300
TOTAL ASSETS	34,091	38,536
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	1,779	2,112
Accrued compensation	839	949
Warranty and other current liabilities	1,884	1,086
Total current liabilities	4,502	4,147
Deferred income taxes	245	241
Other long-term liabilities	168	168
Shareholders' equity:
Common stock, $.01 par value; 20,000,000 shares authorized, 4,971,202 and 4,966,619	50	49
Additional paid-in capital	23,213	23,055
Accumulated other comprehensive income (loss)	560	390
Retained earnings	5,353	10,486
Total shareholders' equity	29,176	33,980
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 34,091	$ 38,536