Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 103,381	$ 89,042
Investments	69,825	69,972
Accounts receivable, net of reserves of $981 and $1,525 at September 30, 2019 and December 31, 2018, respectively	23,889	20,775
Inventories, net	25,243	21,300
Prepaid expenses and other current assets	1,479	1,854
Total current assets	223,817	202,943
Property and equipment, net	51,750	54,111
Operating lease right-of-use assets	23,082
Other long-term assets	5,761	4,897
Intangible assets, net	7,680	9,191
Goodwill	7,489	7,851
Total assets	319,579	278,993
Current liabilities:
Accounts payable	2,702	3,143
Accrued expenses and other current liabilities	8,493	8,146
Total current liabilities	11,195	11,289
Other long-term liabilities	372	550
Deferred tax liability	4,727	3,542
Operating lease liabilities	21,603
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.01 par value; 1,250 shares authorized, no shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	0	0
Common stock, $0.01 par value; 90,000 shares authorized, 14,269 and 14,210 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	143	142
Additional paid-in-capital	46,482	50,763
Accumulated other comprehensive loss	(6,318)	(5,526)
Retained earnings	241,375	218,233
Total stockholders’ equity	281,682	263,612
Total liabilities and stockholders’ equity	$ 319,579	$ 278,993