Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Current assets
Cash and cash equivalents	$ 4,660	$ 1,588
Restricted cash	122
Accounts receivable, net of allowance of $0	85	3
Inventory:
Raw materials	374	150
Work-in-process	155	181
Finished goods	64
Income tax receivable	429	429
Prepaid expenses and other current assets	239	371
Total current assets	6,128	2,722
Property and equipment, net	371	469
Operating leases, right-of-use assets, net	937
Long-term tax receivable		429
Other assets	72	72
Total assets	7,508	3,692
Current liabilities
Accounts payable	188	160
Payroll related accruals	412	319
Accrued expenses and other liabilities	718	357
Income tax payable	2	2
Term note payable - related party	2,500
Lease liabilities, current	326
Total current liabilities	4,146	838
Lease liabilities, non-current	711
Other liabilities		146
Total liabilities	4,857	984
Commitments and contingencies (Note 12)
Stockholders’ equity
Common stock, $0.001 par value, 15,000,000 shares authorized; 7,975,388 and 6,184,698 shares issued at March 31, 2020 and June 30, 2019, respectively; 7,575,742 and 5,775,171 shares outstanding at March 31, 2020 and June 30, 2019, respectively	190,599	190,571
Treasury stock, 399,916 shares at cost at March 31, 2020 and June 30, 2019, respectively	(4,129)	(4,129)
Additional paid-in capital	13,868	7,964
Accumulated deficit	(197,687)	(191,698)
Total stockholders’ equity	2,651	2,708
Total liabilities and stockholders’ equity	7,508	3,692
Convertible Preferred Stock
Stockholders’ equity
Convertible preferred stock, $0.001 par value, 2,500,000 shares authorized; 280,898 shares of Series C and 280,898 shares of Series D issued and outstanding at March 31, 2020 and June 30, 2019, respectively