Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 20,104	$ 19,096
Short-term marketable securities	25,522	22,564
Accounts receivable, net of allowances of $530 at September 30, 2018, and $349 at December 31, 2017	13,015	15,000
Inventory and other deferred costs	23,876	21,046
Prepaid expenses and other current assets	4,293	2,605
Total current assets	86,810	80,311
Property and equipment, net	12,695	12,378
Goodwill	29,804	23,844
Other intangibles, net	13,490	8,234
Deferred tax assets	1,336	1,378
Other assets	192	178
Total assets	144,327	126,323
Current liabilities:
Accounts payable	1,627	1,543
Accrued expenses	11,006	9,770
Acquisition-related obligations	2,006	1,876
Total current liabilities	14,639	13,189
Deferred tax liabilities	2,174	2,176
Other long-term liabilities	2,167	1,188
Total liabilities	18,980	16,553
Stockholders' equity:
Preferred stock, $0.01 par value; authorized 3,000,000 shares; none outstanding
Common stock, $0.01 par value; authorized 37,000,000 shares; issued 21,080,465 shares at September 30, 2018, and 20,745,041 shares at December 31, 2017	211	207
Additional paid-in capital	97,727	93,127
Retained earnings	41,178	28,333
Accumulated other comprehensive loss	(3,482)	(2,289)
Treasury stock, at cost; 1,498,603 shares at September 30, 2018 and 1,480,101 shares at December 31, 2017	(10,287)	(9,608)
Total stockholders' equity	125,347	109,770
Total liabilities and stockholders' equity	$ 144,327	$ 126,323