2. Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

	Year ended December 31,
(In thousands)	2013		2012		2011
Balance, beginning of period	$	66	$	70	$	57
Additions charged to costs and expenses		-		-		1
Acquisition of business		-		-		15
Deductions		(3)		(4)		(3)
Balance, end of period	$	63	$	66	$	70

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	December 31,
	2013		2012
GTECH		21%		37%
Customer A		22%		17%

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Year ended December 31,
	2013		2012		2011
GTECH		12%		18%		26%
Customer A		12%		15%		13%

Schedule of Product Warranty Liability [Table Text Block]

	Year ended December 31,
(In thousands)	2013		2012		2011
Balance, beginning of period	$	274	$	421	$	249
Warranties issued		492		104		472
Acquisition of business		-		-		25
Warranty settlements		(400)		(251)		(325)
Balance, end of period	$	366	$	274	$	421