Prepaids, Deposits and Other Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Prepaids, deposits and other assets	$ 2,558	$ 2,914
Prepaid taxes [Member]
Prepaids, deposits and other assets	947	922
Prepaid leases [Member]
Prepaids, deposits and other assets	727	747
Prepayment to suppliers [Member]
Prepaids, deposits and other assets	458	585
Deposits on EGM orders [Member]
Prepaids, deposits and other assets	32	257
Rental, utilities and other deposits [Member]
Prepaids, deposits and other assets	394	240
Restricted cash [Member]
Prepaids, deposits and other assets	$ 0	$ 163