Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Schedule of Allowance for Doubtful Accounts

The following table summarizes the changes in the allowance for doubtful accounts (in thousands):

Year ended:	Balance at beginning of period		Charged to expense	Deductions		Effect of foreign currency exchange rates		Balance at end of period
December 31, 2010	$	3,692	272	(558	)	(64	)	$	3,342
December 31, 2011	$	3,342	210	(1,863	)	(27	)	$	1,662
December 31, 2012	$	1,662	116	(72	)	26		$	1,732

Schedule of Inventory, Current

Net inventories consisted of the following (in thousands):

December 31:	2012		2011
Raw materials	$	4,348	$	5,401
Work-in process	1,368		1,940
Finished goods	16,728		14,070
Total	$	22,444	$	21,411

Property, Plant and Equipment

Property and equipment consisted of the following (in thousands):

December 31:	2012			2011
Property and equipment, at cost:
Machinery and equipment	$	8,196		$	7,827
Computer hardware and software	7,204			6,562
Leasehold improvements	2,528			2,648
Furniture and fixtures	2,065			2,009
Construction in progress	393			492
Total property and equipment, at cost	20,386			19,538
Less — accumulated depreciation and amortization	(16,651		)	(15,778		)
Total	$	3,735		$	3,760

Depreciation is computed using the straight line method over the estimated useful lives of the related assets, as follows:

	Life (years)
Asset category	From	To
Machinery and equipment	2	5
Computer hardware and software	3	6
Leasehold improvements	1	10
Furniture and fixtures	3	15