Deferred tax liabilities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Deferred tax liabilities
Company has recorded a net deferred tax liability	$ 248,000	$ 217,000
Company's estimated net operating loss carryover approximately	292,000
Increase in deferred tax expense	31,000
Net increase in investments with book basis in excess of tax	$ 134,000