Carrying Value and Estimated Fair Value of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents, carrying amount	$ 76,190		$ 53,699	$ 53,280
Investment securities, available for sale, carrying amount			3,060
Loans receivable, net, carrying amount	3,735		24,372
LIABILITIES
Lines of credit, carrying amount	4,250		1,000
Long-term debt, carrying amount	45,296		47,052
Common stock warrant liability	7,500	3,800	2,350	2,000	1,400	1,403
Assets, estimated fair value
Investment securities, available for sale, estimated fair value			3,060
Liabilities, estimated fair value
Common stock warrant liability	7,500	3,800	2,350	2,000	1,400	1,403
Discontinued Operations
ASSETS
Cash and cash equivalents, carrying amount	116		162
FHLB stock, carrying amount	2,051		2,051
CRA Investment - nonmarketable equity securities, carrying amount	32
Commercial real estate investments, net, carrying amount			51
CRA Investment - commercial loan participation interest, carrying amount	19
Preferred Stock
ASSETS
Stock, carrying amount	800		800
Common Stock
ASSETS
Stock, carrying amount	1,940		1,940
Significant Unobservable Inputs (Level 3)
ASSETS
Investment securities, available for sale, carrying amount
LIABILITIES
Common stock warrant liability	7,500		2,350
Assets, estimated fair value
Investment securities, available for sale, estimated fair value
Loans receivable, net, estimated fair value	4,203		24,850
Liabilities, estimated fair value
Lines of credit, estimated fair value	4,250		1,000
Common stock warrant liability	7,500		2,350
Significant Unobservable Inputs (Level 3) | Discontinued Operations
Assets, estimated fair value
Commercial real estate investments, estimated fair value			51
CRA Investment - commercial loan participation interest, estimated fair value	19
Significant Unobservable Inputs (Level 3) | Preferred Stock
Assets, estimated fair value
Stock, estimated fair value	3,000		2,000
Significant Unobservable Inputs (Level 3) | Common Stock
Assets, estimated fair value
Stock, estimated fair value	1,940		1,940
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	76,190		53,699
Investment securities, available for sale, estimated fair value			3,060
Liabilities, estimated fair value
Common stock warrant liability
Quoted Prices in Active Markets (Level 1) | Discontinued Operations
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	116		162
FHLB stock, estimated fair value	2,051		2,051
CRA Investment - nonmarketable equity securities, estimated fair value	1,035
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
Notes Payable, estimated fair value	35,477		34,732
Term Loan
LIABILITIES
Long-term debt, carrying amount	6,300		6,900
Term Loan | Significant Unobservable Inputs (Level 3)
Liabilities, estimated fair value
Long-term debt, estimated fair value	6,300		6,900
Seller notes
LIABILITIES
Long-term debt, carrying amount	1,750		2,906
Seller notes | Significant Unobservable Inputs (Level 3)
Liabilities, estimated fair value
Long-term debt, estimated fair value	$ 1,750		$ 2,906