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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Activities in allowance for doubtful accounts
Year  Balance at
Beginning of Year		  Charged to
Costs and
Expenses		  Amounts
Written Off		  Balance at
End of
Year
             
 2017   $89,058   $—     $—     $89,058 
 2016   $89,058   $—     $—     $89,058 
Inventory components
   December 31,
   2017  2016
Raw materials and sub-assemblies  $3,016,327   $2,665,185 
Finished goods   67,120    64,359 
Inventory reserves   (885,181)   (1,192,105)
Inventory, net  $2,198,266  $1,537,439
Prepaid expenses and other current assets
   December 31,
   2017  2016
Prepaid insurance   $37,496   $40,307 
Prepaid project development costs    58,755    83,600 
Prepaid inventory purchases    114,927    43,700 
Other    174,330    91,857 
Prepaid expenses and other current assets  $385,508  $259,464
Major customers as a percentage of net accounts receivable balances
   December 31,
   2017  2016
Ingram Micro Inc.      37%   49%
Bluestar, Inc.      23%   30%
ScanSource, Inc.      10%   * 
Ingram Micro Pan Europe GmbH      10%   * 
*Customer accounts for less than 10% of accounts receivable balances
Reserves for product warranty costs
Year  Balance at
Beginning of Year		  Additional Warranty Reserves  Amounts
Charged to Reserves		  Balance at
End of
Year
             
 2017   $78,871   $53,115   $(53,115)  $78,871 
 2016   $78,871   $34,385   $(34,385)  $78,871 
Net income (loss) per share applicable to common stockholders
   Years Ended December 31,
   2017  2016
Numerator:      
   Net income (loss)   $(1,430,731)  $12,147,088 
   Convertible note interest    —      117,421 
   Adjusted diluted net income (loss)   $(1,430,731)  $12,264,509 
 Denominator:          
Weighted average shares outstanding used in computing
net income (loss) per share:		          
          Basic    6,292,898    5,793,245 
 Effect of dilutive stock options and convertible notes payable    —      1,026,576 
          Diluted    6,292,898    6,819,821 
 Net income (loss) per share applicable to common stockholders:          
          Basic   $(0.23)  $2.10 
          Diluted   $(0.23)  $1.80 
Revenue by geographic areas
   Years Ended December 31,
Revenues: (in thousands)  2017  2016
   United States   $16,621   $16,851 
   Europe    3,572    2,843 
   Asia and rest of world    1,093    1,094 
   $21,286  $20,788
Major customers accounted for at least 10% of total revenues
   Years Ended December 31,
   2017  2016
Ingram Micro Inc.    37%   29%
BlueStar, Inc.    17%   22%
ScanSource, Inc.    16%   18%