Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 9,213	$ 8,978
Marketable securities	48,364	29,307
Accounts receivable, net of allowance for doubtful accounts of approximately $1,252 as of September 30, 2013 and $929 as of December 31, 2012	25,731	27,654
Inventories	18,133	16,203
Prepaid expenses and other assets	3,891	3,264
Deferred income taxes	712	1,146
Total current assets	106,044	86,552
Property and equipment, less accumulated depreciation of $35,153 as of September 30, 2013 and $31,657 as of December 31, 2012	36,706	36,733
Intangible assets, less accumulated amortization of $1,633 as of September 30, 2013 and $826 as of December 31, 2012	15,181	1,684
Goodwill	18,086	4,712
Other non-current assets	4,972	4,363
Deferred income taxes	38	3,524
Total assets	181,027	137,568
Current liabilities:
Accounts payable	7,930	7,086
Accrued compensation and employee-related expenses	5,490	6,785
Accrued other	6,969	4,595
Accrued product warranty costs	1,010	814
Deferred revenue	5,468	1,892
Current portion of long-term debt	1,044	138
Total current liabilities	27,911	21,310
Other long-term liabilities	1,121	140
Line of credit	30,000	7,000
Long-term debt, excluding current portion	6,407	3,414
Total liabilities	65,439	31,864
Stockholders’ equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; none issued	0	0
Common stock, $0.01 par value. Authorized 30,000,000 shares; 16,886,063 and 16,563,836 shares issued at September 30, 2013 and December 31, 2012; and 15,227,072 and 14,904,845 shares outstanding at September 30, 2013 and December 31, 2012, respectively	169	166
Additional paid-in capital	115,970	111,514
Retained earnings	12,205	7,307
Accumulated other comprehensive income (loss)	394	(133)
Less: treasury stock at cost, common stock, 1,658,991 shares as of September 30, 2013 and December 31, 2012	(13,150)	(13,150)
Total stockholders’ equity	115,588	105,704
Total liabilities and stockholders’ equity	$ 181,027	$ 137,568