Acquisition (Details) - LCA Vision Inc [Member] $ in Thousands	May. 12, 2014 USD ($)
Fair value LCA-Vision stock	$ 106,552
Common Stock [Member]
Fair value LCA-Vision stock	103,896	[1]
Restricted Stock Units (RSUs) [Member]
Fair value LCA-Vision stock	$ 2,656	[2]

[1] Based on 19,347,554 outstanding shares of LCA-Vision common stock at May 12, 2014.

[2] Based on 476,436 outstanding or deemed to be outstanding restricted stock units of LCA-Vision common stock at May 12, 2014.