Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 43,942	$ 57,237
Trade accounts receivable, less allowance for doubtful accounts and sales returns of $1,674 and $1,629, respectively	43,869	43,565
Inventories, net	28,864	27,642
Prepaid expenses and other current assets	6,658	7,088
Total current assets	123,333	135,532
Property and equipment, net	45,461	44,827
Goodwill	148,964	148,811
Other intangible assets, net	95,310	98,229
Other assets	2,667	2,679
Total assets	415,735	430,078
Current liabilities:
Borrowings under revolving line of credit	27,103	24,712
Accounts payable	6,633	6,230
Accrued liabilities	30,474	34,381
Deferred revenue	1,857	1,619
Total current liabilities	66,067	66,942
Convertible senior notes, net of debt issuance costs	225,355	225,095
Term loan, net of debt issuance costs	59,682	59,664
Accrued liabilities, net of current portion	1,680	1,688
Deferred income taxes	2,498	2,366
Total liabilities	355,282	355,755
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $.001 par value; authorized 5,000,000 shares; none issued	0	0
Common stock, $.001 par value; authorized 120,000,000 shares; issued and outstanding 43,764,753 and 43,303,298 shares, respectively	44	43
Additional paid-in capital	337,171	332,701
Accumulated other comprehensive loss	(5,513)	(5,696)
Accumulated deficit	(271,249)	(252,725)
Total stockholders’ equity	60,453	74,323
Total liabilities and stockholders’ equity	$ 415,735	$ 430,078