Fair Value Measurements - Additional Information (Details)	1 Months Ended		3 Months Ended
	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of interest in variable interest entity		$ 2,800,000	$ 2,800,000
Loss on deconsolidation			$ 300,000
Proceeds from escrowed seller funds		$ 1,100,000
2019 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate				2.125%
Convertible Hedges and Embedded Derivative Financial Instruments | Price Volatility | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expected volatility rate		0.36	0.36
Zero-coupon convertible promissory note due January 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible promissory note, face value		$ 9,100,000	$ 9,100,000
Interest in VIE available upon triggering event		10.00%
Note receivable, fair value		$ 6,800,000	6,800,000
2.89% secured promissory note due April 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note receivable, fair value		$ 1,100,000	$ 1,100,000
Interest on note receivable		2.89%
Forecast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest in VIE available upon non-triggering event	43.00%
Price of additional interest in VIE	$ 1
Retained Investment in Subsidiary
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest in variable interest entity		5.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Grupo Finmart | Notes Receivable | Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input of note receivable		0.07	0.07