Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 126,047	$ 133,256
Investments	13,250	24,000
Accounts receivable, net of reserves of $1,862 and $1,914 at June 30, 2018 and December 31, 2017, respectively	23,389	23,825
Inventories, net	24,060	22,035
Prepaid expenses and other current assets	4,244	3,211
Total current assets	190,990	206,327
Property and equipment, net	55,377	56,183
Other long-term assets	1,157	1,254
Intangible assets, net	9,876	10,635
Goodwill	8,013	8,218
Total assets	265,413	282,617
Current liabilities:
Accounts payable	5,073	6,747
Accrued expenses and other current liabilities	7,459	6,326
Total current liabilities	12,532	13,073
Other long-term liabilities	882	660
Deferred tax liability	5,396	5,393
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $.01 par value; 1,250 shares authorized, no shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	0	0
Common stock, $.01 par value; 90,000 and 60,000 shares authorized, 14,584 and 14,688 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	146	147
Additional paid-in-capital	48,656	68,617
Accumulated other comprehensive loss	(5,115)	(4,784)
Retained earnings	202,916	199,511
Total stockholders’ equity	246,603	263,491
Total liabilities and stockholders’ equity	$ 265,413	$ 282,617