Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 81,825	$ 133,256
Investments	67,186	24,000
Accounts receivable, net of reserves of $1,771 and $1,914 at September 30, 2018 and December 31, 2017, respectively	20,771	23,825
Inventories, net	23,828	22,035
Prepaid expenses and other current assets	1,981	3,211
Total current assets	195,591	206,327
Property and equipment, net	55,041	56,183
Other long-term assets	1,109	1,254
Intangible assets, net	9,564	10,635
Goodwill	7,959	8,218
Total assets	269,264	282,617
Current liabilities:
Accounts payable	2,462	6,747
Accrued expenses and other current liabilities	6,843	6,326
Total current liabilities	9,305	13,073
Other long-term liabilities	574	660
Deferred tax liability	4,120	5,393
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $.01 par value; 1,250 shares authorized, no shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	0	0
Common stock, $.01 par value; 90,000 and 60,000 shares authorized, 14,211 and 14,688 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	142	147
Additional paid-in-capital	49,836	68,617
Accumulated other comprehensive loss	(5,228)	(4,784)
Retained earnings	210,515	199,511
Total stockholders’ equity	255,265	263,491
Total liabilities and stockholders’ equity	$ 269,264	$ 282,617