Consolidated Balance Sheets [Parenthetical] $ in Thousands	Mar. 31, 2016 USD ($) shares	Mar. 31, 2016 € / shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2015 € / shares
Allowance for accounts receivable (in dollars) | $	$ 35		$ 35
Common stock, par value (in euro per share) | € / shares		€ 0.122		€ 0.122
Common stock, shares authorized	53,178		53,178
Common stock, shares issued	41,241		41,241
Common stock, shares outstanding	41,241		41,241