CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (6,493)		$ (1,863)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	4,463		4,686
Share-based compensation	1,643		1,199
Change in contingent consideration for acquisitions	0		(297)
Amortization of note payable issuance costs & discount	736		649
Unrealized loss on equity investment	441		0
Provision for doubtful accounts receivable and allowances, net of recoveries	85		524
Deferred income taxes	2,772		(95)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(635)		949
Inventory	1,023		(2,615)
Prepaid expenses	(1,224)		(1,881)
Accounts payable	1,318		1,183
Accrued wages	48		(1,812)
Restructuring accrual	991		(181)
Deferred revenue	2,387		2,343
Other	1,132		(618)
Net cash provided by operating activities	8,687		2,171
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	0		(500)
Purchases of property, equipment, and leasehold improvements	(393)		(1,743)
Net cash used in investing activities	(393)		(2,243)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	396		745
Principal payments on notes payable	(5)		(27)
Principal payments on capital leases	(103)		(41)
Net cash provided by financing activities	288		677
Effect of exchange rates on cash and cash equivalents	81		(12)
Net increase in cash and cash equivalents	8,663		593
Cash and cash equivalents (net of restricted cash), beginning of period (1)	35,062	[1],[2]	38,565	[1],[3]
Cash and cash equivalents (net of restricted cash), end of period (2)	43,725	[4],[5]	39,158	[4],[6]
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	19		6
Cash paid for income taxes, net of refunds	114		(21)
Non-Cash Investing and Financing Activities
Value of common stock issued for acquisitions	0		5,636
Assets purchased under capital lease obligations	38		0
Assets purchased under lease line facility	$ 211		$ 0

[1] Net of restricted cash of $813 and $707 at December 31, 2012 and 2011, respectively

[2] Net of restricted cash of $813 at December 31, 2012

[3] Net of restricted cash of $707 at December 31, 2011

[4] Net of restricted cash of $813 and $707 at March 31, 2013 and 2012, respectively.

[5] Net of restricted cash of $813 at March 31, 2013

[6] Net of restricted cash of $707 at March 31, 2012