Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

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, 2014	$	1,117	42		(91	)	(6	)	$	1,062
December 31, 2015	$	1,062	40		(38	)	(4	)	$	1,060
December 31, 2016	$	1,060	(5	)	(795	)	7		$	267

Schedule of inventory

Inventories, net of reserves, consisted of the following (in thousands):

December 31:	2016		2015
Raw materials	$	2,485	$	3,132
Work-in process	347		839
Finished goods	6,825		6,255
Total inventories	$	9,657	$	10,226

Schedule of property, plant and equipment

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	7
Leasehold improvements	1	10
Furniture and fixtures	3	15

Property and Equipment

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

December 31:	2016			2015
Machinery and equipment	$	9,026		$	8,557
Computer hardware and software	6,080			6,512
Leasehold improvements	2,041			2,406
Furniture and fixtures	382			438
Construction in progress	53			119
Total property and equipment, at cost	17,582			18,032
Less — accumulated depreciation and amortization	(14,452		)	(13,982		)
Total property and equipment	$	3,130		$	4,050

Schedule of cash and cash equivalents

Cash equivalents are included in the Consolidated Balance Sheets as follows (in thousands):

	Cost		Fair Value
December 31, 2015	$	1,807	$	1,807