Debt (Other Debt Narrative) (Details)	1 Months Ended			6 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($) item $ / shares	Oct. 31, 2016 USD ($) item	Jan. 31, 2013 USD ($) item	Jun. 30, 2017 USD ($) item shares	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares	Dec. 31, 2013 USD ($)
Debt Instruments [Line Items]
Number of warrants issued | shares				100,000
Issuance of common stock from treasury, shares | shares						0	0
Warrants unexercised | shares				70,000
Non-cash interest expense				$ 6,146	$ 6,921
Subordinated promissory notes, exercise price of warrants | $ / shares	$ 3.51					$ 3.51
REF Securities, LLP [Member]
Debt Instruments [Line Items]
Number of warrants issued | shares				20,000
Warrants unexercised | shares				20,000
Chambers Medical Foundation [Member]
Debt Instruments [Line Items]
Number of warrants issued | shares				20,000
Issuance of common stock from treasury, shares | shares								20,000
E.P. Marinos [Member]
Debt Instruments [Line Items]
Number of warrants issued | shares				10,000
Warrants unexercised | shares				10,000
Warrants
Debt Instruments [Line Items]
Issuance of common stock from treasury, shares | shares								30,000
Term Debt And Equipment Notes [Member] | Equipment Term Loans [Member]
Debt Instruments [Line Items]
Number of equipment notes | item			2
Debt instrument, face amount			$ 272,500
Debt instrument, interest rate				4.66%
Approximate monthly principal and interest payment				$ 5,000
Equipment notes, maturity period				5 years
Subordinated Debt [Member]
Debt Instruments [Line Items]
Debt instrument, face amount		$ 450,000							$ 500,000
Debt instrument, maturity date				Dec. 31, 2018
Interest rate				10.00%			12.00%		10.00%
Period for first interest rate of debt instrument				2 years
Payment on subordinated debt	$ 50,000
Number of investors in the private offering | item		7
Number of investors, maturity date extended | item		6
Number of investors, maturity date not extended | item	1
Debt, fair value				$ 18,310
Number of largest beneficial owners | item				2
Percent of test for fair value				10.00%
Unamortized discount	$ 17,989			$ 13,529		$ 17,989
Subordinated Debt [Member] | REF Securities, LLP [Member]
Debt Instruments [Line Items]
Percent of beneficial owner of company's common stock				13.00%
Invested amount in private offering				$ 100,000
Subordinated Debt [Member] | Chambers Medical Foundation [Member]
Debt Instruments [Line Items]
Percent of beneficial owner of company's common stock				10.00%
Invested amount in private offering				$ 100,000
Subordinated Debt [Member] | E.P. Marinos [Member]
Debt Instruments [Line Items]
Invested amount in private offering				$ 50,000
Subordinated Debt [Member] | Three Related Parties [Member]
Debt Instruments [Line Items]
Debt instrument, face amount		$ 250,000