Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Interest and fees on taxable loans	$ 40,827,000	$ 37,241,000	$ 34,530,000
Interest and fees on tax-exempt loans	960,000	540,000	339,000
Interest and dividends on taxable investment securities	11,264,000	6,792,000	5,053,000
Interest and dividends on tax-exempt investment securities	703,000	585,000	364,000
Interest on federal funds sold and other interest-earning assets	473,000	278,000	187,000
Total interest income	54,227,000	45,436,000	40,473,000
Interest expense:
Demand- interest bearing	2,088,000	1,401,000	888,000
Money market and savings	2,639,000	2,170,000	1,929,000
Time deposits	942,000	695,000	719,000
Other borrowings	1,194,000	1,115,000	1,108,000
Total interest expense	6,863,000	5,381,000	4,644,000
Net interest income	47,364,000	40,055,000	35,829,000
Provision for loan losses	1,557,000	500,000	900,000
Net interest income after provision for loan losses	45,807,000	39,555,000	34,929,000
Non-interest income:
Loan advisory and servicing fees	1,627,000	2,226,000	1,452,000
Mortgage banking income	5,062,000
Gain on sales of SBA loans	4,981,000	3,139,000	4,717,000
Service fees on deposit accounts	2,658,000	1,720,000	1,224,000
Legal settlements		2,550,000
Gain on sale of investment securities	656,000	108,000	458,000
Net securities impairment losses recognized in earnings	(7,000)	(3,000)	(7,000)
Other non-interest income	(335,000)	(203,000)	(173,000)
Total non-interest income	15,312,000	9,943,000	8,017,000
Non-interest expenses:
Salaries and employee benefits	28,602,000	22,488,000	20,089,000
Occupancy	6,109,000	4,929,000	4,247,000
Depreciation and amortization	3,518,000	3,080,000	2,382,000
Legal	459,000	915,000	1,290,000
Other real estate owned	2,182,000	4,239,000	1,794,000
Advertising	811,000	627,000	597,000
Data processing	2,408,000	1,593,000	1,345,000
Insurance	962,000	720,000	586,000
Professional fees	1,580,000	1,268,000	1,468,000
Regulatory assessments and costs	1,413,000	1,248,000	1,065,000
Taxes, other	366,000	689,000	616,000
Other operating expenses	7,883,000	5,295,000	5,071,000
Total non-interest expense	56,293,000	47,091,000	40,550,000
Income before benefit for income taxes	4,826,000	2,407,000	2,396,000
Benefit for income taxes	(119,000)	(26,000)	(46,000)
Net income	$ 4,945,000	$ 2,433,000	$ 2,442,000
Net income per share
Basic (in dollars per share)	$ 0.13	$ 0.06	$ 0.07
Diluted (in dollars per share)	$ 0.12	$ 0.06	$ 0.07