In that climate, if your documentary isn't in 3-D or IMAX, larger studios will be loath to touch it. That's just fine by documentarians, who now take to Kickstarter and use other online fundraising approaches to bring projects to life. The 2011 short-form documentary Sun Come Up and the 2012 short Incident In New Baghdad were made with Kickstarter funding, and both were nominated for Academy Awards.

The end game for those documentaries has shifted as well. Where documentarians could once only hope the festival circuit would land them in enough independent theaters to get the message out -- or in any theaters at all -- even that avenue is getting crowded. The 506 films released in 2003 swelled to 683 last year while the number of total theaters in the U.S. dove from 6,100 in 2003 to 5,683 in 2012, according to the latest numbers from the National Association of Theater Owners. The number of screens has jumped to 39,000 from 35,000 during that time, but they're largely in the hands of megaplex chains such as Regal Entertainment Group, Cinemark, Carmike and AMC.

That leaves the distant hope that your documentary will fill one of their small rooms but, otherwise, you're back to the crowded indie circuit again. Unless you get some help in the form of a 44-million-subscriber home streaming service that's not only willing to promote your film, but will distribute it to indie houses as well. That's just the tactic Netflix employed with The Square, which streamed on Netflix and ran in theaters concurrently.

If the intended purpose of a documentary is to document history and culture for posterity, it makes sense to make that document as widely available to its intended viewership as possible. While small theaters and arthouses still go to impressive lengths to bring these films to the public, their very venue narrows the potential. With theater numbers dwindling, not every town will have an arthouse within striking distance of the multiplex showing Frozen on three screens. There's also a slight measure of discomfort that comes with stepping into a small house of cinephiles for the first time to watch 20 Feet From Stardom when you're accustomed to a big room, stadium seats and more familiar content in the previews -- and dealing with the conundrum of whether or not to buy popcorn during such a film (a debate that gets much tougher during films about covert operations, government atrocities and revolution on the streets of Cairo).

Streaming services offer that audience and cut out an imposing middle man. Just as bands that may draw 15 people to shows can now be heard by millions on Pandora, Spotify and other streaming services, a documentary such as Our Nixon, which appeared in exactly five theaters in the U.S. during its run last year, can pop up in the New Releases queues of millions of streaming customers.

Before this year's Oscars, audiences have the chance to see every nominated documentary in the comfort of their own homes before the winners are announced. With Netflix, Amazon and others looking for inexpensive and engaging content to fill their expanding libraries, this nearly two-decade halcyon era of documentary filmmaking make get its biggest audience yet. Especially if streaming services and viewers increasingly get the message.

-- Written by Jason Notte in Portland, Ore.

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Jason Notte is a reporter for TheStreet. His writing has appeared in The New York Times, The Huffington Post,, Time Out New York, the Boston Herald, the Boston Phoenix, the Metro newspaper and the Colorado Springs Independent. He previously served as the political and global affairs editor for Metro U.S., layout editor for Boston Now, assistant news editor for the Herald News of West Paterson, N.J., editor of Go Out! Magazine in Hoboken, N.J., and copy editor and lifestyle editor at the Jersey Journal in Jersey City, N.J.

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