Stock-based compensation (Detail Textuals)	12 Months Ended
	Jun. 30, 2019 USD ($) Board_member Frozen_yogurt_robots unit $ / shares shares	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 $ / shares	Apr. 30, 2016 shares	Jul. 13, 2015 shares	Aug. 14, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $	$ 2,947,233	$ 1,480,538
Non-Qualified Stock Options | June 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $	191,000	279,000
Stock-based compensation to be recognized | $	303,000
Estimated fair value of the options | $	$ 698,000
Vesting period	24 months
Non-Qualified Stock Options | June 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $	$ 2,089,000	$ 1,067,000
Stock-based compensation to be recognized | $	$ 3,327,000
Average forfeiture rate	22.40%
Remaining options expected to vest	4,424,000
Estimated fair value of the options | $	$ 6,464,000
Vesting period	24 months
Non-Qualified Stock Options | September 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $	$ 351,000
Stock-based compensation to be recognized | $	$ 793,000
Vested options	165,000
Remaining options expected to vest	396,000
Number of options granted to employees and consultants	660,000
Number of board members | Board_member	2
Estimated fair value of the options | $	$ 1,144,000
Vesting period	36 months
Weighted average exercise price | $ / shares	$ 1.78
Employee | Non-Qualified Stock Options | June 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted to employees and consultants	1,175,000
Chairman | Non-Qualified Stock Options | June 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested options	2,500,000
Remaining options expected to vest	2,000,000
Number of non qualified stock options	5,000,000
Percentage of non qualified stock options	50.00%
Number of frozen yogurt robots | Frozen_yogurt_robots	400
Cumulative revenue | $	$ 15,000,000
CEO | Non-Qualified Stock Options | June 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of non qualified stock options	500,000
Percentage of non qualified stock options	50.00%
Number of frozen yogurt robots | Frozen_yogurt_robots	800
Cumulative revenue | $	$ 30,000,000
Chairman, CEO and management employees | Non-Qualified Stock Options | June 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted to employees and consultants	6,375,000
Weighted average exercise price | $ / shares	$ 0.87
Chairman, CEO and management employees | Non-Qualified Stock Options | June 30, 2018 | First 50% options vest
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Description of options vest	The options vest 50% upon 1,200 units installed or $45 million in cumulative revenue
Percentage of options vest	50.00%
Number of units installed | unit	1,200
Cumulative revenue | $	$ 45,000,000
Chairman, CEO and management employees | Non-Qualified Stock Options | June 30, 2018 | Second 50% options vest
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Description of options vest	50% upon 2,000 units installed or $75 million in cumulative revenue
Percentage of options vest	50.00%
Number of units installed | unit	2,000
Cumulative revenue | $	$ 75,000,000
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares				6,000,000	4,000,000	2,600,000
Warrants outstanding	3,270,000	3,520,000
2013 Equity Incentive Plan | $.30
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants outstanding	2,000,000	2,000,000
Warrants Exercise price | $ / shares	$ 0.30	$ 0.30
2013 Equity Incentive Plan | $.50
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants outstanding	1,270,000	1,520,000
Warrants Exercise price | $ / shares	$ 0.50	$ 0.50
2013 Equity Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $	$ 253,000	$ 293,000
Stock-based compensation to be recognized | $	$ 260,000
Vested options	2,732,876
Remaining options expected to vest	544,000
Number of options granted to employees and consultants	750,000	332,500
Weighted Average Remaining Contractual Term (years), Outstanding	4 years 4 months 17 days	5 years 2 months 23 days	5 years 8 months 1 day
Weighted average exercise price | $ / shares	$ 0.34	$ 0.21	$ 0.25