Amount due from accrued interest receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged, acquired at the acquisition date.

No definition available.

Note 9 - Business Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($)		9 Months Ended
	Jan. 12, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Net assets acquired:
Goodwill			$ 15,299,000	$ 4,559,000
Merger of Liberty Bank, N.A. into The Middlefield Banking Company [Member]
Total purchase price	$ 42,168,000
Previously held equity interest in Liberty Bank	1,068,000	$ 1,068,000
Net assets acquired:
Cash	26,604,000
Loans and loans held for sale	201,341,000
Premises and equipment, net	325,000
Accrued interest receivable	440,000
Bank-owned life insurance	1,681,000
Core deposit intangible	3,087,000
Other assets	997,000
Time deposits	(30,744,000)
Non-time deposits	(167,300,000)
Accrued interest payable	(47,000)
Deferred taxes	(1,134,000)
Other liabilities	(2,754,000)
	32,496,000
Goodwill	$ 10,740,000