Schedule of repurchase of common stock (Details) - $ / shares		3 Months Ended	9 Months Ended	12 Months Ended
	Aug. 08, 2014	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased	300,000	300,000	255,252	44,748
Total number of shares purchased as part of publicly announced plans or programs		300,000	300,000
Maximum number of shares that may yet be purchased under the plans or programs		0	0
Average price paid per share		$ 0.029
April 1 through April 30, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		0
Total number of shares purchased as part of publicly announced plans or programs		44,748	44,748
Maximum number of shares that may yet be purchased under the plans or programs		255,252	255,252
May 1 through May 31, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		0
Total number of shares purchased as part of publicly announced plans or programs		44,748	44,748
Maximum number of shares that may yet be purchased under the plans or programs		255,252	255,252
June 1 through June 30, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		22,400
Total number of shares purchased as part of publicly announced plans or programs		67,148	67,148
Maximum number of shares that may yet be purchased under the plans or programs		232,852	232,852
Average price paid per share		$ 0.027
July 1 through July 31, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		232,852
Total number of shares purchased as part of publicly announced plans or programs		300,000	300,000
Maximum number of shares that may yet be purchased under the plans or programs		0	0
Average price paid per share		$ 0.029
August 1 through August 31, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		0
Total number of shares purchased as part of publicly announced plans or programs		0	0
Maximum number of shares that may yet be purchased under the plans or programs		0	0
Average price paid per share		$ 0
September 1 through September 30, 2023 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased		0
Total number of shares purchased as part of publicly announced plans or programs		0	0
Maximum number of shares that may yet be purchased under the plans or programs		0	0
Average price paid per share		$ 0