Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 22,030	$ 21,574
Restricted cash	60	403
Accounts receivable, net of allowance of $249 and $148, respectively	19,818	18,497
Contract assets	1,978	1,055
Inventory	23,582	24,051
Prepaid expenses and other current assets	5,183	6,389
Assets held for sale	1,661	0
Total current assets	74,312	71,969
Property, plant, and equipment, net	20,894	37,223
Goodwill	69	69
Operating lease right-of-use assets	15,202	0
Other intangible assets, net	220	239
Other non-current assets	217	62
Total assets	110,914	109,562
Current liabilities:
Borrowings from credit facility		5,497
Accounts payable	10,422	10,701
Accrued expenses and other current liabilities	10,400	14,521
Operating lease liabilities - current	1,048	0
Total current liabilities	21,870	30,719
Operating lease liabilities - non-current	14,225	0
Asset retirement obligations	2,006	1,890
Other long-term liabilities		207
Total liabilities	38,101	32,816
Commitments and contingencies (Note 13)
Shareholders’ equity:
Common stock, no par value, 50,000 shares authorized; 36,201 shares issued and 29,291 shares outstanding as of March 31, 2020; 35,803 shares issued and 28,893 shares outstanding as of September 30, 2019	742,416	739,926
Treasury stock at cost; 6,910 shares	(47,721)	(47,721)
Accumulated other comprehensive income	943	950
Accumulated deficit	(622,825)	(616,409)
Total shareholders’ equity	72,813	76,746
Total liabilities and shareholders’ equity	$ 110,914	$ 109,562