4. Trade Receivables, net (Details Narrative) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2013	Dec. 31, 2012
Trade Receivables Net Details Narrative
Write off	$ 500,000	$ 3,939,000

Amount of direct write-downs of receivables charged against the allowance for doubtful accounts.

No definition available.

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableChargeOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration