Accrued Expenses and Other Payables (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares
Accrued Expenses And Other Payables 1	$ 1,051,000
Accrued Expenses And Other Payables 2	$ 13,650,000
Accrued Expenses And Other Payables 3 | shares	3,500,000
Accrued Expenses And Other Payables 4 | $ / shares	$ 3.90
Accrued Expenses And Other Payables 5	$ 819,000
Accrued Expenses And Other Payables 6	1.50%
Accrued Expenses And Other Payables 7	1.50%
Accrued Expenses And Other Payables 8	144
Accrued Expenses And Other Payables 9	0.50%
Accrued Expenses And Other Payables 10	1.00%
Accrued Expenses And Other Payables 11	$ 561,174
Accrued Expenses And Other Payables 12	$ 159,000