Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 30,390	$ 21,574
Restricted cash	148	403
Accounts receivable, net of allowance of $227 and $148, respectively	25,324	18,497
Contract assets	1,566	1,055
Inventory	25,525	24,051
Prepaid expenses and other current assets	5,589	6,389
Assets held for sale	1,568
Total current assets	90,110	71,969
Property, plant, and equipment, net	21,052	37,223
Goodwill	69	69
Operating lease right-of-use assets	14,566
Other intangible assets, net	202	239
Other non-current assets	242	62
Total assets	126,241	109,562
Current liabilities:
Borrowings from credit facility		5,497
Accounts payable	16,484	10,701
Accrued expenses and other current liabilities	11,577	14,521
Operating lease liabilities - current	992
Total current liabilities	29,053	30,719
PPP liability - non-current	6,488
Operating lease liabilities - non-current	13,735
Asset retirement obligations	2,022	1,890
Other long-term liabilities	794	207
Total liabilities	52,092	32,816
Commitments and contingencies (Note 13)
Shareholders' equity:
Common stock, no par value, 50,000 shares authorized; 36,461 shares issued and 29,551 shares outstanding as of September 30, 2020; 35,803 shares issued and 28,893 shares outstanding as of September 30, 2019	744,361	739,926
Treasury stock at cost; 6,910 shares	(47,721)	(47,721)
Accumulated other comprehensive income	918	950
Accumulated deficit	(623,409)	(616,409)
Total shareholders' equity	74,149	76,746
Total liabilities and shareholders' equity	$ 126,241	$ 109,562