Quarterly report pursuant to Section 13 or 15(d)

Fair value of financial instruments (Details Textual)

v3.19.1
Fair value of financial instruments (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2019
Jun. 28, 2018
Warrants and Rights Outstanding $ 215,000 $ 0.3725
Unrealized Gain Loss on Investments in warrants 55,000  
Proceeds from Issuance of Warrants 215,000  
Warrant [Member]    
Proceeds from Issuance of Warrants $ 152,000