Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Current assets
Cash and cash equivalents	$ 3,349	$ 1,588
Accounts receivable	101	3
Inventory:
Raw materials, net	416	150
Work-in-process	38	181
Finished goods	222
Income tax receivable	429	429
Prepaid expenses and other current assets	117	371
Total current assets	4,672	2,722
Property and equipment, net	99	469
Assets held for disposal, net	237
Operating leases, right-of-use asset, net	851
Long-term income tax receivable		429
Other assets, net	71	72
Total assets	5,930	3,692
Current liabilities
Accounts payable	239	160
Payroll related accruals	433	319
Accrued expenses and other liabilities	627	357
Income tax payable	2	2
Term note payable - related party	2,500
Term note payable	210
Lease liabilities, current	339
Total current liabilities	4,350	838
Term note payable, net of current portion	332
Lease liabilities, non-current	623
Other liabilities		146
Total liabilities	5,305	984
Commitments and contingencies (Note 14)
Stockholders’ equity
Common stock, $0.001 par value, 50,000,000 and 15,000,000 shares authorized at June 30, 2020 and 2019, respectively; 8,250,286 and 6,184,698 shares issued at June 30, 2020 and 2019, respectively; 7,850,362 and 5,775,171 shares outstanding at June 30, 2020 and 2019, respectively	190,599	190,571
Treasury stock, 399,916 shares at cost at June 30, 2020 and 2019	(4,129)	(4,129)
Additional paid-in capital	13,934	7,964
Accumulated deficit	(199,779)	(191,698)
Total stockholders’ equity	625	2,708
Total liabilities and stockholders’ equity	5,930	3,692
Convertible Preferred Stock
Stockholders’ equity
Convertible preferred stock, $0.001 par value, 2,500,000 shares authorized; 0 and 280,898 shares of Series C and 280,898 shares of Series D issued and outstanding at June 30, 2020 and 2019, respectively