Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 29,497	$ 21,574
Restricted cash	185	403
Accounts receivable, net of allowance of $303 and $148, respectively	19,854	18,497
Contract assets	2,079	1,055
Inventory	24,410	24,051
Prepaid expenses and other current assets	5,440	6,389
Assets held for sale	1,580	0
Total current assets	83,045	71,969
Property, plant, and equipment, net	21,210	37,223
Goodwill	69	69
Operating lease right-of-use assets	14,886	0
Other intangible assets, net	211	239
Other non-current assets	217	62
Total assets	119,638	109,562
Current liabilities:
Borrowings from credit facility		5,497
PPP liability - current	2,458	0
Accounts payable	13,075	10,701
Accrued expenses and other current liabilities	10,788	14,521
Operating lease liabilities - current	1,020	0
Total current liabilities	27,341	30,719
PPP liability - non-current	4,030	0
Operating lease liabilities - non-current	13,981	0
Asset retirement obligations	2,014	1,890
Other long-term liabilities		207
Total liabilities	47,366	32,816
Commitments and contingencies (Note 13)
Shareholders' equity:
Common stock, no par value, 50,000 shares authorized; 36,318 shares issued and 29,408 shares outstanding as of June 30, 2020; 35,803 shares issued and 28,893 shares outstanding as of September 30, 2019	743,160	739,926
Treasury stock at cost; 6,910 shares	(47,721)	(47,721)
Accumulated other comprehensive income	945	950
Accumulated deficit	(624,112)	(616,409)
Total shareholders' equity	72,272	76,746
Total liabilities and shareholders' equity	$ 119,638	$ 109,562