Concentration of credit risk (Tables)

3 Months Ended

Sep. 30, 2018

Concentration Risk [Line Items]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Concentration of Credit Risk

Credit Risk

Financial Instruments, which potentially subject the Company to concentration of credit risk, consist principally of cash and cash equivalents, and trade receivables. Concentration of credit risk with respect to trade receivables is generally diversified due to the large number of entities comprising the Company's customer base and their dispersion across geographic areas principally within the United States and international. The Company routinely address the financial strength of its customer and, as a consequence, believes that its receivable credit risk exposure is limited. The Company does not require customers to post collateral.

Major Customer

No customer accounted for more than 10% of net sales during the three months ended September 30, 2018 and 2017.

As of September 30, 2018 the Company had one customer that represents approximately 12% of the total accounts receivable balance. As of June 30, 2018 the Company had one customer that represents approximately 11% of the total accounts receivable balance.

Major supplier

Our two largest suppliers accounted for of total purchases for more than 36% for the three-month periods ended September 30, 2018 and one largest supplier accounted for 38% of total purchase for the three-month periods ended September 30, 2017.

Foreign sales

Domestic and international sales from continuing operations are as follows:

Three-month Periods Ended September 30,
2018			2017
1,469,000	65.06	%	1,747,000	66.43	%
789,000	34.94	%	883,000	33.57	%
2,258,000	100.00	%	2,630,000	100.00	%

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Foreign sales

Domestic and international sales from continuing operations are as follows:

Three-month Periods Ended September 30,
2018			2017
1,469,000	65.06	%	1,747,000	66.43	%
789,000	34.94	%	883,000	33.57	%
2,258,000	100.00	%	2,630,000	100.00	%