Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 39,747	$ 41,489
Restricted securities	508	747
Trade receivables, net	54,771	47,108
Other receivables	6,967	4,324
Inventories	45,422	45,478
Deferred preservation costs	32,416	33,174
Prepaid expenses and other	8,726	6,848
Total current assets	188,557	179,168
Property and equipment, net	30,823	31,028
Operating lease right-of-use assets, net	22,413
Goodwill	188,106	188,781
Acquired technology, net	113,567	118,184
Other intangibles, net	40,977	41,897
Deferred income taxes	3,975	4,111
Other	8,705	7,922
Total assets	597,123	571,091
Current liabilities:
Accounts payable	6,942	7,547
Accrued compensation	9,432	10,733
Current portion of long-term debt	1,164	1,160
Current maturities of operating leases	5,021
Taxes payable	2,489	2,250
Accrued expenses and other	12,420	12,833
Total current liabilities	37,468	34,523
Long-term debt	215,013	215,721
Non-current maturities of operating leases	19,241
Deferred income taxes	26,672	27,267
Other	16,576	18,513
Total liabilities	314,970	296,024
Commitments and contingencies
Shareholders' equity:
Preferred stock
Common stock (issued shares of 38,943 in 2019 and 38,463 in 2018)	389	385
Additional paid-in capital	265,694	260,361
Retained earnings	37,519	34,984
Accumulated other comprehensive (loss) income	(6,858)	(6,072)
Treasury stock at cost (shares of 1,484 in 2019 and 1,484 in 2018)	(14,591)	(14,591)
Total shareholders' equity	282,153	275,067
Total liabilities and shareholders' equity	$ 597,123	$ 571,091