Carrying Value and Estimated Fair Value of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents, carrying amount	$ 71,367		$ 50,894	$ 47,569
Restricted cash	2,805		2,805
Loans receivable, net, carrying amount	4,325		24,372
Stock, carrying amount	2,159		2,740
Investment securities, available for sale, carrying amount			3,060
LIABILITIES
Lines of credit, carrying amount	500		1,000
Long-term debt, carrying amount	44,419		47,052
Common stock warrant liability	10,800	7,500	2,350	2,850	2,000	1,403
Assets, estimated fair value
Investment securities, available for sale, estimated fair value			3,060
Liabilities, estimated fair value
Common stock warrant liability	10,800	7,500	2,350	2,850	2,000	1,403
Quoted Prices in Active Markets (Level 1)
ASSETS
Investment securities, available for sale, carrying amount			3,060
LIABILITIES
Common stock warrant liability
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	71,367		50,894
Restricted cash	2,805		2,805
Investment securities, available for sale, estimated fair value			3,060
Liabilities, estimated fair value
Common stock warrant liability
Significant Unobservable Inputs (Level 3)
ASSETS
Investment securities, available for sale, carrying amount
LIABILITIES
Common stock warrant liability	10,800		2,350
Assets, estimated fair value
Loans receivable, net, estimated fair value	4,771		24,850
Investment securities, available for sale, estimated fair value
Liabilities, estimated fair value
Lines of credit, estimated fair value	500		1,000
Common stock warrant liability	10,800		2,350
Significant Other Observable Inputs (Level 2)
ASSETS
Investment securities, available for sale, carrying amount
LIABILITIES
Common stock warrant liability
Assets, estimated fair value
Investment securities, available for sale, estimated fair value
Liabilities, estimated fair value
Common stock warrant liability
Discontinued Operations
ASSETS
Cash and cash equivalents, carrying amount	114		162
FHLB stock, carrying amount			2,051
Discontinued Operations | Quoted Prices in Active Markets (Level 1)
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	114		162
FHLB stock, estimated fair value			2,051
Preferred Stock
ASSETS
Stock, carrying amount	800		800
Preferred Stock | Significant Unobservable Inputs (Level 3)
Assets, estimated fair value
Stock, estimated fair value	3,000		2,000
Common Stock
ASSETS
Stock, carrying amount	1,359		1,940
Common Stock | Significant Unobservable Inputs (Level 3)
Assets, estimated fair value
Stock, estimated fair value			1,940
Common Stock | Significant Other Observable Inputs (Level 2)
Assets, estimated fair value
Stock, estimated fair value	1,359
Commercial real estate loans | Discontinued Operations
ASSETS
Commercial real estate investments, net (other current assets), carrying amount	32		51
Commercial real estate loans | Discontinued Operations | Quoted Prices in Active Markets (Level 1)
Assets, estimated fair value
Commercial real estate investments, net (other assets), estimated fair value	1,000
Commercial real estate loans | Discontinued Operations | Significant Unobservable Inputs (Level 3)
Assets, estimated fair value
Commercial real estate investments, net (other assets), estimated fair value			51
Notes payable
LIABILITIES
Long-term debt, carrying amount	37,246		37,246
Notes payable | Quoted Prices in Active Markets (Level 1)
Liabilities, estimated fair value
Long-term debt, estimated fair value	35,477		34,732
Term Loan
LIABILITIES
Long-term debt, carrying amount	6,000		6,900
Term Loan | Significant Unobservable Inputs (Level 3)
Liabilities, estimated fair value
Long-term debt, estimated fair value	6,000		6,900
Seller notes
LIABILITIES
Long-term debt, carrying amount	1,173		2,906
Seller notes | Significant Unobservable Inputs (Level 3)
Liabilities, estimated fair value
Long-term debt, estimated fair value	$ 1,173		$ 2,906