Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2017	$ 586,200	$ 12,440,000	$ (12,811,000)	$ 215,200
Balance shares at Dec. 31, 2017	58,616,716
Cumulative effect of accounting change			96,100	96,100
Net income			95,800	95,800
Balance at Mar. 31, 2018	$ 586,200	12,440,000	(12,619,100)	407,100
Balance shares at Mar. 31, 2018	58,616,716
Balance at Dec. 31, 2017	$ 586,200	12,440,000	(12,811,000)	215,200
Balance shares at Dec. 31, 2017	58,616,716
Cumulative effect of accounting change				96,100
Net income				1,543,300
Balance at Jun. 30, 2018	$ 586,200	12,440,000	(11,171,600)	1,854,600
Balance shares at Jun. 30, 2018	58,616,716
Balance at Mar. 31, 2018	$ 586,200	12,440,000	(12,619,100)	407,100
Balance shares at Mar. 31, 2018	58,616,716
Net income			1,447,500	1,447,500
Balance at Jun. 30, 2018	$ 586,200	12,440,000	(11,171,600)	1,854,600
Balance shares at Jun. 30, 2018	58,616,716
Balance at Dec. 31, 2018	$ 586,200	12,440,000	(11,059,500)	$ 1,966,700
Balance shares at Dec. 31, 2018	58,616,716			58,616,716
Net income			85,400	$ 85,400
Balance at Mar. 31, 2019	$ 586,200	12,440,000	(10,974,100)	2,052,100
Balance shares at Mar. 31, 2019	58,616,716
Balance at Dec. 31, 2018	$ 586,200	12,440,000	(11,059,500)	$ 1,966,700
Balance shares at Dec. 31, 2018	58,616,716			58,616,716
Net income				$ 234,300
Balance at Jun. 30, 2019	$ 586,200	12,440,000	(10,825,200)	$ 2,201,000
Balance shares at Jun. 30, 2019	58,616,716			58,616,716
Balance at Mar. 31, 2019	$ 586,200	12,440,000	(10,974,100)	$ 2,052,100
Balance shares at Mar. 31, 2019	58,616,716
Net income			148,900	148,900
Balance at Jun. 30, 2019	$ 586,200	$ 12,440,000	$ (10,825,200)	$ 2,201,000
Balance shares at Jun. 30, 2019	58,616,716			58,616,716