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6. Debt (Details Narrative) - USD ($)
$ in Thousands
Nov. 24, 2015
Apr. 17, 2015
May 11, 2012
Dec. 31, 2017
Dec. 31, 2016
Debt issuance costs       $ 1,900 $ 1,600
Warehouse lines of credit       112,408 103,358
Warehouse Credit Facility [Member] | Citibank [Member]          
Credit line maximum     $ 100,000    
Warehouse lines of credit       77,500  
Credit line maturity date     Aug. 31, 2018    
Warehouse Credit Facility [Member] | Fortress Investment Group [Member]          
Credit line maximum   $ 100,000      
Warehouse lines of credit       25,600  
Credit line maturity date   Apr. 30, 2019      
Warehouse Credit Facility [Member] | Credit Suisse AG and Ares Agent Services [Member]          
Credit line maximum $ 100,000        
Warehouse lines of credit       11,100  
Credit line maturity date Nov. 30, 2019        
Three Warehouse Lines Of Credit [Member]          
Warehouse lines of credit       $ 114,300 $ 105,000