Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 21,013	$ 24,208
Short-term investments	13,965	19,801
Accounts receivable, less allowance for doubtful accounts of $107 and $246	23,110	21,094
Inventories	19,943	17,660
Other current assets	3,080	2,954
Total current assets	81,111	85,717
Property and equipment, net	29,959	29,995
Long-term investments		3,000
Intangible assets, net	51,447	52,131
Goodwill	105,257	105,257
Other noncurrent assets	736	321
Total Assets	268,510	276,421
Current liabilities:
Accounts payable	11,697	10,673
Accrued liabilities	14,707	16,467
Other current liabilities and current maturities of capital leases and long-term debt	5,291	1,688
Total current liabilities	31,695	28,828
Capital leases	13,048	13,319
Long-term debt	20,421	23,886
Other noncurrent liabilities	41,845	41,946
Total Liabilities	107,009	107,979
Commitments and contingencies (Note 7)
Stockholders' Equity:
Common stock, $0.001 par value, 90,000 shares authorized and 34,326 and 33,342 issued and outstanding	34	33
Additional paid-in capital	377,554	367,851
Accumulated other comprehensive loss	(47)	(468)
Accumulated deficit	(216,040)	(198,974)
Total Stockholders' Equity	161,501	168,442
Total Liabilities and Stockholders' Equity	$ 268,510	$ 276,421

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.