Nature of Business and Summary of Significant Accounting Policies - Disaggregated net sales by product type (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Revenue	$ 76,000	$ 118,000	$ 289,000	$ 344,000
Mobile banking technology revenue
Revenue	24,000	17,000	70,000	68,000
Other revenue, management fee - related party
Revenue	$ 52,000	$ 101,000	$ 219,000	$ 276,000