Equity - Narrative (Details) $ / shares in Units, $ in Millions							9 Months Ended
	Sep. 09, 2021 day $ / shares	Jul. 01, 2021 USD ($)	May 29, 2021 USD ($) shares	Jan. 11, 2019 shares	Nov. 30, 2018 shares	Aug. 02, 2016 shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 $ / shares shares	Dec. 20, 2018 shares	Dec. 18, 2018 shares
Class of Warrant or Right [Line Items]
Additional share consideration valued at | $							$ 1.4	$ 0.6
Proceed from exchange for accrued and unpaid dividend | $		$ 0.3
Preferred stock cumulative cash dividend rate							7.50%
Preferred stock dividend rate							4.00%
Accreting dividend threshold rate							7.25%
Volume weighted average price threshold percentage							150.00%
Consent rights percentage (at least)							75.00%
Par value (in usd per share) | $ / shares							$ 0.001		$ 0.001
Rights to common stock holders threshold period	10 days
Beneficial ownership percentage	4.90%
Threshold period to result in acquiring person | day	10
Maximum
Class of Warrant or Right [Line Items]
Preferred stock dividend rate							2.00%
Minimum
Class of Warrant or Right [Line Items]
Preferred stock dividend rate							0.00%
Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Shares issued (in shares)							0		6,375
Preferred stock conversion price (in usd per share) | $ / shares							$ 3.52
Series A-2 shares issued and outstanding
Class of Warrant or Right [Line Items]
Shares issued (in shares)							0		4,000
Preferred stock conversion price (in usd per share) | $ / shares							$ 5.33
Common Stock
Class of Warrant or Right [Line Items]
Redemption of preferred stock | $			$ 10.4
Number of shares of common stock from conversion (in shares)			50,410
Series A-3 Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock conversion price (in usd per share) | $ / shares							$ 4.25
Number of shares to be issued upon conversion of preferred stock (in shares)							1,764,357
Series A-4 Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock conversion price (in usd per share) | $ / shares							$ 8.25
Number of shares to be issued upon conversion of preferred stock (in shares)							1,875,533
Series A-4 shares issued and outstanding
Class of Warrant or Right [Line Items]
Par value (in usd per share) | $ / shares	$ 0.001
Preferred stock purchase price (in usd per unit) | $ / shares	$ 20.00
CGI
Class of Warrant or Right [Line Items]
Stock repurchase program, expected to be redemption | $			$ 16.1
Stock repurchase program, expected to be redemption current fair value | $							$ 19.1
CGI | Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Shares issued (in shares)										6,125	6,125
Stock repurchase program, number of shares expected to be redeemed (in shares)			6,125
CGI | Series A-2 shares issued and outstanding
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)				10,000
Stock repurchase program, number of shares expected to be redeemed (in shares)			10,000
Corrib Master Fund, Ltd. | Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)						1,000
Conversion of stock, number of shares (in shares)							13,477	23,566
Luxor Capital Partners, LP | Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Conversion of stock, number of shares (in shares)							119,784	209,467
Luxor Capital Partners, LP | Series A-1 shares issued and outstanding
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)						9,000
Corrib Master Fund, Ltd. and Luxor Capital Partners, LP
Class of Warrant or Right [Line Items]
Preferred stock trading days to calculate volume weighted average price (at least)							30 days
Volume weighted average price threshold period							2 days
Percent of accrued value							1.875%
DBMGi
Class of Warrant or Right [Line Items]
Preferred stock, dividend, paid in kind percentage							9.00%
Preferred stock, dividend paid in cash, percentage							8.25%
DBMGi | LIBOR
Class of Warrant or Right [Line Items]
Preferred stock, dividend, basis spread on variable rate							5.85%
DBMGi | Paid In Kind
Class of Warrant or Right [Line Items]
Preferred stock, dividend, basis spread on variable rate							0.75%
DBMGi | Series A shares issued and outstanding | Consolidation, Eliminations
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)					40,000
DBMGi | Series A shares issued and outstanding | Discontinued Operations | CIG
Class of Warrant or Right [Line Items]
Issued in disposal group | $		$ 40.9