Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in- Capital	Accumulated Deficit	Non-controlling Interest
Balance (in shares) at Sep. 30, 2017		12,437,916
Balance at Sep. 30, 2017	$ 38,903	$ 248	$ 66,955	$ (28,315)	$ 15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation for restricted stock units	258		258
Net income (loss)	(8,040)			(8,040)
Balance (in shares) at Dec. 31, 2017		12,437,916
Balance at Dec. 31, 2017	31,121	$ 248	67,213	(36,355)	15
Balance (in shares) at Sep. 30, 2017		12,437,916
Balance at Sep. 30, 2017	38,903	$ 248	66,955	(28,315)	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant liability reclassification	16,791
Net income (loss)	(9,480)
Balance (in shares) at Jun. 30, 2018		12,490,990
Balance at Jun. 30, 2018	47,727	$ 249	85,273	(37,795)	0
Balance (in shares) at Dec. 31, 2017		12,437,916
Balance at Dec. 31, 2017	31,121	$ 248	67,213	(36,355)	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation for restricted stock units	418		418
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding (in shares)		51,585
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding	(82)	$ 1	(83)
Warrant liability reclassification	16,791		16,791
Deconsolidation of subsidiary	(15)				(15)
Net income (loss)	(2,252)			(2,252)
Balance (in shares) at Mar. 31, 2018		12,489,501
Balance at Mar. 31, 2018	45,981	$ 249	84,339	(38,607)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares of common stock for warrant exercises (in shares)		1,489
Issuance of shares of common stock for warrant exercises	5
Stock-based compensation for restricted stock units	929		929
Net income (loss)	812			812
Balance (in shares) at Jun. 30, 2018		12,490,990
Balance at Jun. 30, 2018	47,727	$ 249	85,273	(37,795)	0
Balance (in shares) at Sep. 30, 2018		12,541,890
Balance at Sep. 30, 2018	46,935	$ 250	86,510	(39,825)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation for restricted stock units	1,322		1,322
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding (in shares)		68,655
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding	(101)	$ 2	(103)
Net income (loss)	956			956
Balance (in shares) at Dec. 31, 2018		12,610,545
Balance at Dec. 31, 2018	48,977	$ 252	87,729	(39,004)	0
Balance (in shares) at Sep. 30, 2018		12,541,890
Balance at Sep. 30, 2018	46,935	$ 250	86,510	(39,825)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant liability reclassification	0
Net income (loss)	(697)
Balance (in shares) at Jun. 30, 2019		13,064,964
Balance at Jun. 30, 2019	49,266	$ 261	89,662	(41,556)	899
Balance (in shares) at Dec. 31, 2018		12,610,545
Balance at Dec. 31, 2018	48,977	$ 252	87,729	(39,004)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares of common stock for warrant exercises (in shares)		38
Stock-based compensation for restricted stock units	1,480		1,480
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding (in shares)		289,283
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding	(131)	$ 6	(137)
Net income (loss)	(2,785)			(2,785)
Balance (in shares) at Mar. 31, 2019		12,899,866
Balance at Mar. 31, 2019	47,541	$ 258	89,072	(41,789)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation for restricted stock units	720		720
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding (in shares)		165,098
Issuance of shares of common stock with respect to vested restricted stock units, net of shares tendered for tax withholding	(127)	$ 3	(130)
Net income (loss)	1,132			233	899
Balance (in shares) at Jun. 30, 2019		13,064,964
Balance at Jun. 30, 2019	$ 49,266	$ 261	$ 89,662	$ (41,556)	$ 899