Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Income Taxes (Textual)      
Net operating loss carryovers $ 34,200    
Operating loss carryovers expiration year 2034    
U.S. statutory federal tax rate 21.00% 27.55%  
Prior U.S. corporate income tax rate 35.00%    
Current U.S. corporate income tax rate 21.00%    
Valuations allowance against deferred tax assets $ 4,600    
Net change in the valuation allowance 5,500    
Gross unrecognized tax benefits 148 $ 296
Gross deferred tax assets $ 148    
Net operating loss, description   The Company had federal loss carryovers of approximately $34.2 million that will expire in stages beginning in 2034 if unused and federal loss carryovers of $26.5 million that will carry forward indefinitely. The North Carolina and New York state loss carryovers of approximately $22.3 million and $12.5 million, respectively, will begin to expire in 2029 if unused. Federal research credits of $0.5 million will expire beginning in 2034 if not utilized.