Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 126,960	$ 104,261
Investments	25,750	20,500
Accounts receivable, net of reserves of $217 and $194 at September 30, 2017 and December 31, 2016, respectively	23,804	27,598
Inventories, net	20,252	15,983
Prepaid expenses and other current assets	2,268	2,098
Total current assets	199,034	170,440
Property and equipment, net	53,973	52,296
Other long-term assets	1,283	69
Intangible assets, net	10,738	10,227
Goodwill	8,104	7,214
Total assets	273,132	240,246
Current liabilities:
Accounts payable	5,189	2,303
Accrued expenses and other current liabilities	6,516	6,496
Total current liabilities	11,705	8,799
Other long-term liabilities	545	2,126
Deferred tax liability	7,593	6,548
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.01 par value; 1,250 shares authorized, no shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	0	0
Common stock, $0.01 par value; 60,000 shares authorized, 14,662 and 14,627 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	146	146
Additional paid-in-capital	66,746	61,735
Accumulated other comprehensive loss	(5,047)	(7,317)
Retained earnings	191,444	168,209
Total stockholders’ equity	253,289	222,773
Total liabilities and stockholders’ equity	$ 273,132	$ 240,246