Nature of Business and Summary of Significant Accounting Policies - Disaggregated net sales by customer type (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 133,000	$ 72,000	$ 213,000	$ 226,000
Medical
Revenue	16,000	20,000	34,000	39,000
Associations
Revenue	3,000	3,000	6,000	6,000
Education
Revenue	3,000	3,000	6,000	6,000
Other
Revenue	$ 111,000	$ 46,000	$ 167,000	$ 175,000