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Financing Agreements and Subsequent Event (Details) |  |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 12, 2017 | Jul. 01, 2015 USD ($) item | Jun. 30, 2017 | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014
Financing arrangements |  |  |  |  |  |
Total debt |  |  |  | $ 6,585,298 | $ 7,636,429 |
Discount on Devicix Notes Payable |  |  |  | (102,424) | (142,072) |
Debt Issuance Costs |  |  |  | (25,896) | (44,175) |
Total long-term debt |  |  |  | 6,456,978 | 7,450,182 |
Current maturities of long-term debt |  |  |  | (1,565,347) | (1,495,513) |
Long-term debt - net of current maturities |  |  |  | 4,891,631 | 5,954,669 |
Future maturity requirements for long-term debt |  |  |  |  |  |
2017 |  |  |  | 1,565,347 |  |
2018 |  |  |  | 2,716,668 |  |
2019 |  |  |  | 578,055 |  |
2020 |  |  |  | 230,067 |  |
2021 |  |  |  | 230,067 |  |
Future |  |  |  | 1,265,094 |  |
Total debt |  |  |  | $ 6,585,298 | $ 7,636,429 |
Line of credit |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Variable rate basis |  |  |  | three-month LIBOR |  |
Interest rate margin on variable rate basis (as a percent) |  |  |  | 2.25% |  |
Interest rate (as a percent) |  |  |  | 3.25% |  |
Weighted-average interest rate (as a percent) |  |  |  | 3.10% | 2.80% |
Outstanding balance |  |  |  | $ 7,315,262 | $ 7,691,237 |
Minimum fixed charge coverage ratio |  |  |  | 1.20 |  |
Minimum fixed charge coverage ratio thereafter |  |  |  | 1.15 |  |
Unused availability supported by entity's borrowing base |  |  |  | $ 5,700,000 |  |
Real estate term note |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Variable rate basis |  |  |  | three-month LIBOR |  |
Interest rate margin on variable rate basis (as a percent) |  |  |  | 2.75% |  |
Interest rate (as a percent) |  |  |  | 3.75% |  |
Amount of monthly principal payments |  |  |  | $ 19,000 |  |
Tenth Amendment To Third Amended and Restated Credit and Security Agreement | Subsequent Event. |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Minimum fixed charge coverage ratio |  |  | 1.05 |  |  |
Minimum fixed charge coverage ratio thereafter | 1.10 |  |  |  |  |
Real estate term notes |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Variable rate basis |  |  |  | three-month LIBOR |  |
Total debt |  |  |  | $ 2,415,428 | 2,645,495 |
Future maturity requirements for long-term debt |  |  |  |  |  |
Total debt |  |  |  | $ 2,415,428 | 2,645,495 |
Equipment notes maturing in May 2015 |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Variable rate basis |  |  |  | three-month LIBOR |  |
Interest rate margin on variable rate basis (as a percent) |  |  |  | 2.75% |  |
Amount of monthly principal payments |  |  |  | $ 46,000 |  |
Total debt |  |  |  | 2,489,624 | 2,633,740 |
Future maturity requirements for long-term debt |  |  |  |  |  |
Total debt |  |  |  | 2,489,624 | 2,633,740 |
Industrial revenue bond payable to the City of Blue Earth, Minnesota |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 0.24%
Amount of annual principal payments |  |  |  | 80,000 |  |
Total debt |  |  |  | 200,000 | 280,000 |
Future maturity requirements for long-term debt |  |  |  |  |  |
Total debt |  |  |  | $ 200,000 | 280,000 |
Devicix Acq Note 1, subordinate debt, due July 1, 2019 |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 4.00% |  |
Total debt |  |  |  | $ 643,585 | 903,128 |
Future maturity requirements for long-term debt |  |  |  |  |  |
Total debt |  |  |  | $ 643,585 | 903,128 |
Devicix Acq Note 2, subordinate debt, due July 1, 2019 |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 4.00% |  |
Total debt |  |  |  | $ 836,661 | 1,174,066 |
Future maturity requirements for long-term debt |  |  |  |  |  |
Total debt |  |  |  | $ 836,661 | $ 1,174,066 |
Devicix LLC |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Number of promissory notes | item |  | 2 |  |  |  |
Devicix LLC | Promissory note subject to offsets |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Promissory note liability |  | $ 1,000,000 |  |  |  |
Term of promissory note |  | 4 years |  |  |  |
Interest rate per annum |  | 4.00% |  |  |  |
Principal and interest payments |  | $ 22,579 |  |  |  |
Devicix LLC | Promissory note not subject to offsets |  |  |  |  |  |
Financing arrangements |  |  |  |  |  |
Promissory note liability |  | $ 1,300,000 |  |  |  |
Term of promissory note |  | 4 years |  |  |  |
Interest rate per annum |  | 4.00% |  |  |  |
Principal and interest payments |  | $ 29,353 |  |  |  |

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- Definition Carrying amount of long-term debt, including unamortized discount or premium and debt issuance costs, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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