SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of year	$ 142	$ 20
Additions Charged to Costs and Expenses	579	178
Additions Charged to other Accounts	0	0
Deductions	(508)	(56)
Balance at end of year	213	142
Allowance for Obsolete Inventories [Member]
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of year	2,009	1,619
Additions Charged to Costs and Expenses	2,124	1,229
Additions Charged to other Accounts	0	0
Deductions	(1,991)	(839)
Balance at end of year	2,142	2,009
Valuation Allowance for Deferred Tax Assets [Member]
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of year	5,264	8,519
Additions Charged to Costs and Expenses	5,344	612
Additions Charged to other Accounts	0	0
Deductions	(863)	(3,867)
Balance at end of year	9,745	5,264
Reserve for Sales Returns [Member]
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of year	238	156
Additions Charged to Costs and Expenses	1,628	1,371
Additions Charged to other Accounts	0	0
Deductions	(1,659)	(1,289)
Balance at end of year	$ 207	$ 238