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Liquidity and financial condition (Details Textual) (USD $) In Thousands, unless otherwise specified	1 Months Ended					1 Months Ended	3 Months Ended
	Apr. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 MGT [Member]	Mar. 31, 2013 Mgt Gaming [Member]	Apr. 26, 2013 Subsequent Event [Member]	Mar. 31, 2013 Subsequent Event [Member]
Accumulated deficit		$ (282,570)	$ (283,631)
Restricted cash		2,039	2,039	4,717	4
Proceeds from Warrant Exercises	292					2,614	2,906
Restricted Cash No Longer Required To Maintain							$ 2,000

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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