Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Redeemable Preferred Stock [Member]	Warrant [Member]	Common Stock [Member]	Conversion of Preferred Stock to Common Stock [Member] Redeemable Preferred Stock [Member]	Conversion of Preferred Stock to Common Stock [Member] Common Stock [Member]	Issuance of Preferred and Conversion to Common Stock Upon Exercise of Warrants, Net [Member] Warrant [Member]	Issuance of Preferred and Conversion to Common Stock Upon Exercise of Warrants, Net [Member] Common Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Conversion of Preferred Stock to Common Stock [Member]	APIC - Convertible Preferred Stock [Member]	APIC - Convertible Preferred Stock [Member] Conversion of Preferred Stock to Common Stock [Member]	Warrant [Member]	Warrant [Member] Issuance of Preferred and Conversion to Common Stock Upon Exercise of Warrants, Net [Member]	Common Stock [Member]	Common Stock [Member] Conversion of Preferred Stock to Common Stock [Member]	APIC - Common Stock [Member]	APIC - Common Stock [Member] Conversion of Preferred Stock to Common Stock [Member]	APIC - Common Stock [Member] Issuance of Preferred and Conversion to Common Stock Upon Exercise of Warrants, Net [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Retained Earnings [Member] Conversion of Preferred Stock to Common Stock [Member]	Treasury Stock [Member]
Shares, Outstanding - Period Start at Dec. 31, 2017		14,460,517	24,959	2,328,278
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Dec. 31, 2017	$ 216,727								$ 16		$ 267,974		$ 130		$ 3		$ 24,700			$ (142)	$ (70,732)		$ (5,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				96,667
Stock Issued During Period, Value, Stock Options Exercised	161																161
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,477																1,477
Other Comprehensive Income (Loss), Net of Tax	2																			2
Net Income (Loss) Attributable to Parent	38,369																				38,369
Shares, Outstanding - Period End at Mar. 31, 2018		14,460,517	24,959	2,424,945
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Mar. 31, 2018	256,736								16		267,974		130		3		26,338			(140)	(32,363)		(5,222)
Shares, Outstanding - Period Start at Dec. 31, 2017		14,460,517	24,959	2,328,278
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Dec. 31, 2017	216,727								16		267,974		130		3		24,700			(142)	(70,732)		(5,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Preferred Stock, Paid-in-kind	0
Net Income (Loss) Attributable to Parent	98,121
Shares, Outstanding - Period End at Sep. 30, 2018		14,043,977	24,959	2,950,667
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Sep. 30, 2018	320,767								16		257,887		130		3		40,699			(135)	27,389		(5,222)
Shares, Outstanding - Period Start at Mar. 31, 2018		14,460,517	24,959	2,424,945
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Mar. 31, 2018	256,736								16		267,974		130		3		26,338			(140)	(32,363)		(5,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				49,419
Stock Issued During Period, Value, Stock Options Exercised	341																341
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,709																1,709
Other Comprehensive Income (Loss), Net of Tax	3																			3
Net Income (Loss) Attributable to Parent	38,913																				38,913
Shares, Outstanding - Period End at Jun. 30, 2018		14,460,517	24,959	2,474,364
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Jun. 30, 2018	297,702								16		267,974		130		3		28,388			(137)	6,550		(5,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				32,024
Stock Issued During Period, Value, Stock Options Exercised	374																374
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,850																1,850
Stockholders' Equity, Other Shares					(416,540)
Stockholders' Equity, Other												$ (10,087)
Stock Issued During Period, Shares, Conversion of Convertible Securities						444,279
Stock Issued During Period, Value, Conversion of Convertible Securities																		$ 10,087
Dividends, Preferred Stock, Paid-in-kind	0
Other Comprehensive Income (Loss), Net of Tax	2																			2
Net Income (Loss) Attributable to Parent	20,839																				20,839
Shares, Outstanding - Period End at Sep. 30, 2018		14,043,977	24,959	2,950,667
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Sep. 30, 2018	320,767								16		257,887		130		3		40,699			(135)	27,389		(5,222)
Shares, Outstanding - Period Start at Dec. 31, 2018		14,043,977	24,959	2,935,249
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Dec. 31, 2018	346,549								16		257,887		130		3		44,411			(132)	52,662		(8,428)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				7,317
Stock Issued During Period, Value, Stock Options Exercised	142																142
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,980																1,980
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(125)																				(125)
Other Comprehensive Income (Loss), Net of Tax	(3)																			(3)
Net Income (Loss) Attributable to Parent	14,614																				14,614
Shares, Outstanding - Period End at Mar. 31, 2019		14,043,977	24,959	2,942,566
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Mar. 31, 2019	363,157								16		257,887		130		3		46,533			(135)	67,151		(8,428)
Shares, Outstanding - Period Start at Dec. 31, 2018		14,043,977	24,959	2,935,249
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Dec. 31, 2018	346,549								16		257,887		130		3		44,411			(132)	52,662		(8,428)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Preferred Stock, Paid-in-kind	(37,456)
Net Income (Loss) Attributable to Parent	38,435
Shares, Outstanding - Period End at Sep. 30, 2019		0	15,869	27,001,251
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Sep. 30, 2019	461,117								0		0		63		6		416,196			(168)	53,516		(8,496)
Shares, Outstanding - Period Start at Mar. 31, 2019		14,043,977	24,959	2,942,566
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period Start at Mar. 31, 2019	363,157								16		257,887		130		3		46,533			(135)	67,151		(8,428)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				2,216
Stock Issued During Period, Value, Stock Options Exercised	4																4
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	2,035																2,035
Other Comprehensive Income (Loss), Net of Tax	(41)																			(41)
Net Income (Loss) Attributable to Parent	13,792																				13,792
Shares, Outstanding - Period End at Jun. 30, 2019		14,043,977	24,959	2,944,782
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Jun. 30, 2019	378,947								16		257,887		130		3		48,572			(176)	80,943		(8,428)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				96,371
Stock Issued During Period, Value, Stock Options Exercised	645																645
Adjustments to Additional Paid in Capital, Other	(86)																(86)
Stock Issued During Period, Shares, New Issues				4,873,356
Stock Issued During Period, Value, New Issues	60,479																60,479
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	11,163																11,163
Stockholders' Equity, Other Shares					(14,043,977)		(9,090)
Stockholders' Equity, Other										$ (16)		$ (257,887)		$ (67)
Stock Issued During Period, Shares, Conversion of Convertible Securities						19,075,167		3,969
Stock Issued During Period, Value, Conversion of Convertible Securities																$ 3		$ 295,356	$ 67
Dividends, Preferred Stock, Paid-in-kind	(37,456)																					$ (37,456)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures				11,627
Shares Withheld, Shares, Net Share Settlement				(4,021)
Shares Withheld, Value, Net Share Settlement	(68)																						(68)
Other Comprehensive Income (Loss), Net of Tax	8																			8
Net Income (Loss) Attributable to Parent	10,029																				10,029
Shares, Outstanding - Period End at Sep. 30, 2019		0	15,869	27,001,251
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest - Period End at Sep. 30, 2019	$ 461,117								$ 0		$ 0		$ 63		$ 6		$ 416,196			$ (168)	$ 53,516		$ (8,496)