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Subsequent Events (Q3) (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Apr. 19, 2018
Oct. 04, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Mar. 24, 2017
Subsequent Event [Line Items]                    
Stock issued (in shares)           620,000        
Stock issued, par value (in dollars per share)     $ 0.001     $ 0.001   $ 0.001 $ 0.001 $ 0.001
Proceeds from issuance of stock     $ 1,055,000 $ 0 $ 0 $ 122,000 $ 850,000 $ 0 $ 0  
Common Stock [Member]                    
Subsequent Event [Line Items]                    
Stock issued (in shares)     0     620,000        
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Termination fee of SEDA $ 100,000                  
Subsequent Event [Member] | Garden State Securities, Inc. ("GSS") [Member]                    
Subsequent Event [Line Items]                    
Percentage of purchase price of common stock 10.00%                  
Warrant to purchase shares of common stock (in shares) 86,957                  
Exercise price of warrants (in dollars per share) $ 1.15                  
Warrant expiration period 5 years                  
Percentage of amount paid by investor 5.00%                  
Subsequent Event [Member] | Maximum [Member]                    
Subsequent Event [Line Items]                    
Termination period of SEDA 18 months                  
Subsequent Event [Member] | Common Stock [Member]                    
Subsequent Event [Line Items]                    
Stock issued (in shares) 869,565 380,000                
Stock issued, par value (in dollars per share) $ 0.001                  
Sale of stock, commitment period 2 years                  
Sale of stock at discount rate 8.00%                  
Shares issued as commitment fees (in shares) 100,000                  
Commitment period 2 years                  
Subsequent Event [Member] | Common Stock [Member] | Initial Shares [Member]                    
Subsequent Event [Line Items]                    
Proceeds from issuance of stock $ 1,000,000                  
Subsequent Event [Member] | Common Stock [Member] | Maximum [Member]                    
Subsequent Event [Line Items]                    
Value of shares authorized for sale $ 5,000,000