Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 7,677	$ 16,269
Trade accounts receivable, net of allowance for doubtful accounts of $50 in 2011 and 2010	4,027	3,389
Inventory, net	2,380	3,489
Prepaid expenses and other current assets	587	581
Total current assets	14,671	23,728
Property and equipment, net of accumulated depreciation and amortization of $2,709 in 2011 and $2,852 in 2010	2,357	2,774
Other assets	609	675
Intangible assets, net of accumulated amortization of $7,793 in 2011 and $6,746 in 2010	18,107	21,165
Goodwill	47,657	45,689
Total assets	83,401	94,031
Current liabilities:
Accounts payable	2,355	2,500
Accrued and other expenses	4,989	5,902
Deferred revenue	5,344	4,906
Total current liabilities	12,688	13,308
Contingent consideration	3,800	5,000
Deferred revenue, long-term portion	1,378	961
Other long-term liabilities	1,041	1,552
Total liabilities	18,907	20,821
Commitments and Contingencies (see Note 5)
Stockholders' equity:
Preferred stock, $ .01 par value: authorized 1,000,000 shares; none issued	0	0
Common stock, $ .01 par value: authorized 85,000,000 shares; issued 54,745,430 in 2011 and 54,383,747 in 2010; outstanding 54,677,554 in 2011 and 54,315,871 in 2010	547	544
Additional paid-in capital	163,676	163,101
Accumulated deficit	(98,779)	(89,485)
Treasury stock at cost (67,876 shares)	(950)	(950)
Total stockholders' equity	64,494	73,210
Total liabilities and stockholders' equity	$ 83,401	$ 94,031