Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 37,588	$ 33,375
Restricted securities	830	884
Receivables:
Trade accounts, net	23,419	21,064
Other	3,253	1,799
Total receivables	26,672	22,863
Inventories	14,643	12,739
Deferred preservation costs	24,741	25,196
Deferred income taxes		6,210
Prepaid expenses and other	5,189	4,761
Total current assets	109,663	106,028
Property and equipment:
Equipment and software	28,608	26,699
Furniture and fixtures	4,483	4,375
Leasehold improvements	30,902	30,660
Total property and equipment	63,993	61,734
Less accumulated depreciation and amortization	52,509	49,732
Net property and equipment	11,484	12,002
Other assets:
Restricted cash	5,000	5,000
Goodwill	11,365	11,365
Patents, less accumulated amortization of $2,664 in 2015 and $2,497 in 2014	1,417	1,784
Trademarks and other intangibles, less accumulated amortization of $7,997 in 2015 and $6,352 in 2014	18,480	19,496
Deferred income taxes	18,188	15,659
Other	5,582	4,823
Total assets	181,179	176,157
Current liabilities:
Accounts payable	4,590	4,497
Taxes payable	58	46
Accrued compensation	6,335	5,406
Accrued procurement fees	4,445	4,675
Accrued expenses	2,847	2,991
Other	1,330	3,012
Total current liabilities	19,605	20,627
Deferred compensation liability	1,927	1,918
Deferred rent obligations	1,735	1,649
Other	2,661	3,278
Total liabilities	$ 25,928	$ 27,472
Commitments and contingencies
Shareholders' equity:
Common stock $0.01 par value per share, 75,000 shares authorized, 29,766 shares issued in 2015 and 29,229 shares issued in 2014	$ 298	$ 292
Additional paid-in capital	142,888	135,227
Retained earnings	23,365	22,768
Accumulated other comprehensive loss	(76)	(121)
Treasury stock at cost, 1,265 shares in 2015 and 1,101 in 2014	(11,224)	(9,481)
Total shareholders' equity	155,251	148,685
Total liabilities and shareholders' equity	$ 181,179	$ 176,157