Condensed Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for note receivable	$ 619,000	$ 619,000
Accumulated amortization of acquisition fees	44,839	44,471
Accumulated amortization of property purchase costs	$ 20,639	$ 20,471