Stockholders' Equity - Additional Information (Detail)					1 Months Ended		12 Months Ended
	May 10, 2016 USD ($) $ / shares shares	Jan. 04, 2016 USD ($) $ / shares shares	Nov. 01, 2015 USD ($)	Oct. 22, 2015 $ / shares shares	Oct. 31, 2015 USD ($) Unit $ / shares	Jan. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Class Of Stock [Line Items]
Proceeds from initial public stock offering, net (See Note 9)								$ 9,688,196
Net proceeds from initial public offering								9,688,196
Deferred tax asset								1,974,022
Redemption of membership interest						$ 2,000,000		$ 1,960,010
Number of options granted | shares							172,504	94,500
Weighted average exercise price of options | $ / shares							$ 12.14	$ 10.00
Options granted, weighted average grant date fair value | $ / shares							$ 1.21	$ 2.36
Recognized compensation expense of stock options							$ 275,000	$ 14,000
Remaining unrecognized compensation cost							$ 89,000	209,000
Date of recognize for remaining unrecognized compensation cost							Apr. 30, 2019
Stock options remaining life, years							9 years
Employees [Member]
Class Of Stock [Line Items]
Number of options granted | shares		84,600
Weighted average exercise price of options | $ / shares		$ 12.50
Maximum term of an option from the date of grant		10 years
Vesting period of stock options		3 years
Options granted, weighted average grant date fair value | $ / shares		$ 1.27
Recognized compensation expense of stock options		$ 107,000
Former President [Member]
Class Of Stock [Line Items]
Number of options granted | shares				94,500
Weighted average exercise price of options | $ / shares				$ 10.00
Maximum term of an option from the date of grant				10 years
Consultants [Member]
Class Of Stock [Line Items]
Number of options granted | shares		37,904
Weighted average exercise price of options | $ / shares		$ 12.50
Maximum term of an option from the date of grant		10 years
Options granted, weighted average grant date fair value | $ / shares		$ 0.70
Recognized compensation expense of stock options		$ 26,000
Non-Employee Director [Member]
Class Of Stock [Line Items]
Number of options granted | shares		25,000
Weighted average exercise price of options | $ / shares		$ 10.00
Maximum term of an option from the date of grant		10 years
Vesting period of stock options		3 years
Options granted, weighted average grant date fair value | $ / shares		$ 1.90
Recognized compensation expense of stock options		$ 48,000
Employee [Member]
Class Of Stock [Line Items]
Number of options granted | shares	25,000
Weighted average exercise price of options | $ / shares	$ 12.50
Maximum term of an option from the date of grant	10 years
Vesting period of stock options	3 years
Options granted, weighted average grant date fair value | $ / shares	$ 1.08
Recognized compensation expense of stock options	$ 27,000
Subsidiaries | CRE Funding LLC [Member]
Class Of Stock [Line Items]
Purchase amount of minority interest			$ 250,000
Percentage held by minority interest			5.00%
LM Funding America, Inc [Member]
Class Of Stock [Line Items]
Redemption of membership interest						$ 1,960,000
IPO [Member]
Class Of Stock [Line Items]
Number of units closed in initial public offering | Unit					1,200,000
Public offering price | $ / shares					$ 10.00
Proceeds from initial public stock offering, net (See Note 9)					$ 12,000,000
Costs incurred related to initial public offering					2,312,000
Net proceeds from initial public offering					9,688,000		$ 3,681,349	$ 166,711
Close out members' account					5,257,000
Deferred tax asset					$ 1,974,000