Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 95,514,000	$ 89,042,000
Investments	71,222,000	69,972,000
Accounts receivable, net of reserves of $1,210 and $1,525 at March 31, 2019 and December 31, 2018, respectively	18,265,000	20,775,000
Inventories, net	22,617,000	21,300,000
Prepaid expenses and other current assets	2,077,000	1,854,000
Total current assets	209,695,000	202,943,000
Property and equipment, net	53,051,000	54,111,000
Right-of-use assets	23,748,000
Other long-term assets	4,003,000	4,897,000
Intangible assets, net	8,467,000	9,191,000
Goodwill	7,695,000	7,851,000
Total assets	306,659,000	278,993,000
Current liabilities:
Accounts payable	3,571,000	3,143,000
Accrued expenses and other current liabilities	8,031,000	8,146,000
Total current liabilities	11,602,000	11,289,000
Other long-term liabilities	366,000	550,000
Deferred tax liability	3,388,000	3,542,000
Lease liabilities	22,232,000
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $.01 par value; 1,250 shares authorized, no shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	0	0
Common stock, $.01 par value; 60,000 shares authorized, 14,214 and 14,210 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	142,000	142,000
Additional paid-in-capital	52,030,000	50,763,000
Accumulated other comprehensive loss	(5,841,000)	(5,526,000)
Retained earnings	222,740,000	218,233,000
Total stockholders’ equity	269,071,000	263,612,000
Total liabilities and stockholders’ equity	$ 306,659,000	$ 278,993,000