Consolidated Statement of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Non-controlling Interest
Beginning Balance, Amount at Sep. 30, 2019	$ 244,035	$ 187	$ 664,086	$ (392)	$ (419,291)	$ (555)
Beginning Balance, Shares at Sep. 30, 2019		95,506,000
Stock-based compensation	4,491		4,491
Exercise of stock options, Amount	3,002	$ 1	3,001
Exercise of stock options, Shares		472,000
Common stock - restricted stock units vesting, Amount		$ 1	(1)
Common stock - restricted stock units vesting, Shares		533,000
Common stock - issued for cash, Amount	250,478	$ 5	250,473
Common stock - issued for cash, Shares		4,600,000
Foreign currency translation adjustments	196			196
Net income (loss)	(2,673)				(2,673)
Ending Balance, Amount at Dec. 31, 2019	499,529	$ 194	922,050	(196)	(421,964)	$ (555)
Ending Balance, Shares at Dec. 31, 2019		101,111,000
Beginning Balance, Amount at Sep. 30, 2020	461,779	$ 195	965,410	18	(503,844)
Beginning Balance, Shares at Sep. 30, 2020		102,376,000
Stock-based compensation	8,144		8,144
Exercise of stock options, Amount	$ 5,101		5,101
Exercise of stock options, Shares	537,612	538,000
Common stock - restricted stock units vesting, Shares		280,000
Foreign currency translation adjustments	$ 180			180
Net income (loss)	(20,732)				(20,732)
Ending Balance, Amount at Dec. 31, 2020	$ 454,472	$ 195	$ 978,655	$ 198	$ (524,576)
Ending Balance, Shares at Dec. 31, 2020		103,194,000