Funds Borrowed - Additional Information (Detail) - USD ($)					1 Months Ended			3 Months Ended	12 Months Ended
		Jul. 06, 2019	Dec. 31, 2007	Jun. 30, 2007	Mar. 31, 2019	Nov. 30, 2018	Apr. 30, 2016	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2019	Dec. 31, 2017
Debt Instrument [Line Items]
Deferred costs									$ 5,105,000	$ 4,461,000
Repayments of credit facilities		$ 10,819,000
Waiver of loan from lender		$ 2,422,000
Waiver Expiry Date		Apr. 01, 2020
Pay off one of the notes payable discount rate						50.00%
Gain on debt extinguishment								$ 4,145,000	$ 4,145,000
Gain loss on sales of loans net	[1]									$ 4,946,000
Issue of common stock									27,597,802	27,385,600
Short term promissory note									$ 38,223,000	$ 55,178,000
Richard Petty [Member]
Debt Instrument [Line Items]
Maturity date									Mar. 31, 2020
Loan amount									$ 7,294,000
Annual interest rate									2.00%
Travis Burt [Member]
Debt Instrument [Line Items]
Maturity date									Dec. 31, 2020
Short term promissory note									$ 500,000
Preferred Securities [Member]
Debt Instrument [Line Items]
Sale of preferred securities				$ 35,000,000
Issue of common stock				1,083
Maturity date									Sep. 30, 2037
Preferred securities outstanding									$ 33,000,000
Preferred Securities [Member] | 90 day LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate									1.91%
Preferred Securities [Member] | LIBOR Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate									2.13%
Unsecured Debt [Member] | Preferred Securities [Member]
Debt Instrument [Line Items]
Aggregate principal amount of unsecured junior subordinated notes				$ 36,083,000
Third Party Investors [Member] | Preferred Securities [Member]
Debt Instrument [Line Items]
Preferred securities repurchased from a third party investor			$ 2,000,000
Retail and Privately Placed Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate Percentage					8.25%		9.00%	8.25%
Aggregate principal amount					$ 30,000,000		$ 33,625,000	$ 30,000,000			$ 6,000,000
Maturity date					2024		2021
Gain loss on sales of loans net								$ 4,145,000
Net proceeds from offering							$ 31,786,000
Dz Bank [Member]
Debt Instrument [Line Items]
Debt instrument interest rate Percentage						4.00%
Debt instrument face amount						$ 1,400,000
Debt instrument expiration date						2023-12
Small Business Administration Debentures and Borrowings [Member]
Debt Instrument [Line Items]
Loan commitment term									4 years 6 months
Commitment fee percentage									1.00%
Principal amount of loan												$ 34,024,756
Debt instrument interest rate Percentage									3.25%
Extended maturity date									Jun. 01, 2020
Debt instrument commitments amount fully utilized									$ 172,485,000
Debt instrument commitments available									3,000,000
Debt instrument outstanding amount									71,746,000
Debt instrument remaining amount									20,746,000
FSVC's [Member]
Debt Instrument [Line Items]
Principal amount of loan												$ 33,485,000
Minimum [Member]
Debt Instrument [Line Items]
Time deposits									250,000
Minimum [Member] | Paid on or Before February 1, 2018 [Member] | Small Business Administration Debentures and Borrowings [Member]
Debt Instrument [Line Items]
Debt instrument minimum annual payment									5,000,000
Minimum [Member] | Paid on or Before February 1, 2019 [Member] | Small Business Administration Debentures and Borrowings [Member]
Debt Instrument [Line Items]
Debt instrument minimum annual payment									$ 7,600,000
Brokerage [Member] | Maximum [Member]
Debt Instrument [Line Items]
Average brokerage fee percentage in relation to the maturity of deposits									0.15%

[1] Balance includes the nine months ended December 31, 2018 under Bank Holding Company Accounting and the three months ended March 31, 2018 under Investment Company Accounting.