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Revision of Prior Period Financial Statements - Schedule of Financial Statement Line Item Correction of the Amounts Previously Reported to the Revised Amounts (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Total revenue $ 6,966 $ 4,882    
Interest (expense) (164) (18)    
Other income, net 9 57    
Net income (loss) (12) 85    
Additional paid-in capital 199,573 181,728 $ 199,372  
Accumulated deficit (195,210) (196,006) (195,198)  
Total equity 8,547 6,298 $ 8,357 $ 5,817
As Previously Reported [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Interest (expense)   (34)    
Net income (loss)   69    
Additional paid-in capital   180,769    
Accumulated deficit   (194,250)    
Total equity   7,095    
Adjustment [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Interest (expense)   16    
Other income, net   57    
Net income (loss)   16    
Additional paid-in capital   959    
Accumulated deficit   (1,756)    
Total equity   (797)    
Asset Management [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Total revenue 5,435 4,154    
Direct costs $ 4,632 3,667    
Asset Management [Member] | As Previously Reported [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Total revenue   3,861    
Direct costs   3,317    
Asset Management [Member] | Adjustment [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Total revenue   293    
Direct costs   $ 350