Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Statement Of Financial Position [Abstract]
Accounts payable to related party	$ 1,729	$ 1,330
Deferred credits to related party	$ 5,751	$ 7,702
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	125,000,000	125,000,000
Common stock, shares issued	31,413,287	23,902,903
Common stock, shares outstanding	31,413,287	23,902,903
Common stock, warrants issued	3,600,953	10,614,990
Common stock, warrants outstanding	3,600,953	10,614,990