Liquidity and financial condition (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Liquidity And Financial Condition [Line Items]
Accumulated deficit	$ (296,346,000)		$ (293,833,000)
Sale Of Stock Offering Price	8,500,000
Manager fee percentage on gross sales price	3.00%
Restricted cash	2,563,000
Proceeds from Issuance of Common Stock	316,000	0
Shares Issuance Description	The Shares sold in the offering will be issued pursuant to the Companys effective shelf registration statement on Form S3 (File No. 333182298) previously filed with the Securities and Exchange Commission (the SEC) in accordance with the provisions of the Securities Act of 1933, as amended (the Securities Act), as supplemented by a prospectus supplement dated December 30, 2013 for the sale of up to $8.5 million of Shares, which the Company filed with the SEC pursuant to Rule 424(b)(5) under the Securities Act.
Subsequent Event [Member]
Liquidity And Financial Condition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	474,079
Proceeds from Issuance of Common Stock	502,000
Common Stock, Value, Subscriptions	8,000,000
Mgt Gaming [Member]
Liquidity And Financial Condition [Line Items]
Restricted cash	10,000
FanTD [Member]
Liquidity And Financial Condition [Line Items]
Restricted cash	$ 97,000