Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Domestic	$ 25,794,000	$ 16,177,000	$ 9,551,000
Foreign	1,281,000	(88,000)	406,000
Income before provision for income taxes	27,075,000	16,089,000	9,957,000
Current:
Federal	7,181,000	4,285,000	196,000
State	1,006,000	896,000	207,000
Foreign	154,000	(70,000)	368,000
Total current	8,341,000	5,111,000	771,000
Deferred:
Federal	2,169,000	1,116,000	3,757,000
State	651,000	(527,000)	473,000
Foreign	(264,000)	0	64,000
Total deferred	2,556,000	589,000	4,294,000
Provision for income taxes	10,897,000	5,700,000	5,065,000
Income Tax Reconciliation:
U.S. federal tax provision at statutory rate	9,476,000	5,631,000	3,485,000
State taxes	1,077,000	240,000	543,000
Non-deductible expenses	530,000	481,000	350,000
Acquisition costs	431,000	0	0
Share-based compensation expense	403,000	443,000	244,000
Research tax credits	0	(755,000)	(137,000)
Repatriation of foreign earnings	0	(77,000)	560,000
Domestic production deduction	(601,000)	(271,000)	0
Other	(419,000)	8,000	20,000
Provision for income taxes	10,897,000	5,700,000	5,065,000
Components of Deferred Tax Assets and Liabilities:
Deferred Tax Assets, Tax Credit Carryforwards	2,990,000	3,066,000
Deferred Tax Assets, Inventory related items	2,900,000	3,032,000
Deferred Tax Assets, Deferred revenue	11,497,000	11,979,000
Deferred Tax Assets, Stock compensation	9,331,000	9,187,000
Deferred Tax Assets, Loss carry forwards	53,000	0
Deferred Tax Assets, Other net	69,000	82,000
Deferred Tax Assets, Gross	26,840,000	27,346,000
Deferred Tax Assets, Valuation Allowance	(39,000)	0
Deferred Tax Assets, Net of Valuation Allowance	26,801,000	27,346,000
Deferred Tax Liabilities, Reserves and accruals	(573,000)	(1,277,000)
Deferred Tax Liabilities, Depreciation and amortization	(39,840,000)	(4,040,000)
Deferred Tax Liabilities, Gross	(40,413,000)	(5,317,000)
Deferred Tax Assets, Net		22,029,000
Deferred Tax Liabilities, Net	13,612,000
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	5,796,000	5,431,000	4,295,000
Increases related to tax positions taken during a prior period	43,000	0	795,000
Increases related to tax positions related to MTS	1,066,000
Decreases related to tax positions taken during the prior period	0	(88,000)	(80,000)
Increases related to tax positions taken during the current period	422,000	453,000	421,000
Decreases related to settlements	(33,000)
Decreases related to expiration of statute of limitations	(379,000)
Unrecognized Tax Benefits	6,915,000	5,796,000	5,431,000
Tax effected amounts of gross unrealized net operating loss and business tax credit carry forwards excluded under ASC 718	3,200,000
Undistributed Earnings of Foreign Subsidiaries	2,200,000
Unrecognized tax benefits that would affect tax expense	6,100,000
State and Local Jurisdiction [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Operating Loss Carryforwards	1,500,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Tax Credit Carryforward, Amount	6,700,000
Internal Revenue Service (IRS) [Member] | Research Tax Credit Carryforward [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Tax Credit Carryforward, Amount	3,000,000
MTS-Medication Technologies [Member]
Components of Deferred Tax Assets and Liabilities:
Deferred Tax Liabilities, Net	$ 33,100,000